SBOSA41 Data sheet

SBOSA41A May 2023 – September 2023 TMP4718

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

DGK|8
- MPDS028E

Thermal pad, mechanical data (Package|Pins)

Orderable Information

8.6 Register Map

Table 8-4 TMP471 Registers

ADDRESS	TYPE	RESET	ACRONYM	REGISTER NAME	SECTION
00h	R	00h	Temp_Local	Local temperature register	GO
01h	R	00h	Temp_Remote_MSB	Remote temperature MSB register	GO
02h	R/RC	00h	Alert_Status	Alert status register	GO
03h or 09h	R/W	05h	Configuration	Configuration register	GO
04h or 0Ah	R/W	08h	Conv_Period	Conversion period register	GO
05h or 0Bh	R/W	46h	THigh_Limit_Local	Local high limit register	GO
06h	R	00h	Reserved	Reserved
07h or 0Dh	R/W	46h	THigh_Limit_Remote_MSB	Remote high limit MSB register	GO
08h or 0Eh	R/W	D8h	TLow_Limit_Remote_MSB	Remote low limit MSB register	GO
0Ch	R	00h	Reserved	Reserved
0Fh	W	00h	One_Shot	One shot conversion register	GO
10h	R	00h	Temp_Remote_LSB	Remote temperature LSB register	GO
11h	R/W	00h	Remote_Offset_MSB	Remote temperature offset MSB	GO
12h	R/W	00h	Remote_Offset_LSB	Remote temperature offset LSB	GO
13h	R/W	00h	THigh_Limit_Remote_LSB	Remote high limit LSB register	GO
14h	R/W	00h	TLow_Limit_Remote_LSB	Remote low limit LSB register	GO
16h	R/W	07h	Alert_Mask	Alert mask register	GO
19h	R/W	XXh	THigh_Crit_Remote	Remote Crit limit register	GO
20h	R/W	XXh	THigh_Crit_Local	Local Crit limit register	GO
21h	R/W	0Ah	Crit_Hysteresis	Crit hysteresis register	GO
2Dh	R/W	00h	Log1	Data log 1 register	GO
2Eh	R/W	00h	Log2	Data log 2 register	GO
2Fh	R/W	00h	Log3	Data log 3 register	GO
BFh	R/W	00h	Filter_Alert_Mode	Filter and alert mode register	GO
FDh	R	50h	Chip_ID	Chip ID register	GO
FEh	R	60h	Vendor_ID	Vendor ID register	GO
FFh	R	90h	Device_Rev_ID	Device and Revision ID register	GO

Table 8-5 TMP471 Access Type Codes

Access Type	Code	Description
Read Type
R	R	Read
RC	R C	Read to Clear
Write Type
W	W	Write
Reset or Default Value
-n		Value after reset or the default value

8.6.1 Temp_Local Register (Address = 00h) [reset = 00h]

This register stores the latest temperature conversion result in a 8-bit two's complement format with a LSB (Least Significant Bit) equal to 1°C.

Return to Register Map.

Figure 8-16 Temp_Local Register

7	6	5	4	3	2	1	0
Temp_Local[7:0]
R-00h

Table 8-6 Temp_Local Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Temp_Local[7:0]	R	00h	8-bit local temperature conversion result. Temperature data is represented by a 8-bit, two's complement byte with an LSB (Least Significant Bit) equal to 1°C.

8.6.2 Temp_Remote_MSB Register (Address = 01h) [reset = 00h]

This register stores the latest temperature conversion result Most Significant Byte (MSB) in a 11-bit two's complement format with a least significant bit equal to 0.125°C.

Return to Register Map.

Figure 8-17 Temp_Remote_MSB Register

7	6	5	4	3	2	1	0
Temp_Remote[10:3]
R-00h

Table 8-7 Temp_Remote_MSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Temp_Remote[10:3]	R	0h	11-bit remote temperature channel conversion result Most Significant Byte Temperature data is represented by a 11-bit, two's complement word with a least significant bit equal to 0.125°C.

8.6.3 Alert_Status Register (Address = 02h) [reset = 00h]

This register shows the current alert status of the device.

Return to Register Map.

Figure 8-18 Alert_Status Register

7	6	5	4	3	2	1	0
ADC_Busy	THigh_LA	Reserved	THigh_RA	TLow_RA	Remote_DC	TCrit_R	TCrit_L
R-0h	R-0h	Reserved	R-0h	R-0h	R-0h	R-0h	R-0h

Table 8-8 Alert_Status Register Field Descriptions

Bit	Field	Type	Reset	Description
7	ADC_Busy	R	0h	Indicates if the ADC is busy in the middle of a conversion 0h = The ADC is idle 1h = The ADC is converting
6	THigh_LA	R	0h	Indicates if the measured local temperature result is higher than the local high limit register setting. 0h = The local temperature is within normal operation 1h = The local temperature exceeds the limit
5	Reserved	R	0h	Reserved
4	THigh_RA	R	0h	Indicates if the measured remote temperature result is higher than the remote high limit register setting. 0h = The remote temperature is within normal operation 1h = The remote temperature exceeds the high alert limit
3	TLow_RA	R	0h	Indicates if the measured remote temperature result is lower than the remote low limit register setting. 0h = The remote temperature is within normal operation 1h = The remote temperature exceeds the low alert limit
2	Remote_DC	R	0h	Indicates if the remote temperature channel is disconnected. This bit does not affect the ALERT or T_CRIT pin. 0h = The remote channel is connected 1h = The remote channel is disconnected
1	TCrit_R	R	0h	Indicates if the measured remote temperature result is above the limit configured in the THigh_Crit_Remote register. 0h = The remote temperature is within normal operation 1h = The remote temperature exceeds the limit
0	TCrit_L	R	0h	Indicates if the measured local temperature result is above the limit configured in the THigh_Crit_Local register. 0h = The local temperature is within normal operation 1h = The local temperature exceeds the limit

8.6.4 Configuration Register (Address = 03h or 09h) [reset = 05h]

This register is used to configure the operation of the device. Changes to the configuration register will disrupt an on-going conversion (except when configuring the device into Shutdown mode) and will be serviced after completion of the conversion.

Return to Register Map.

Figure 8-19 Configuration Register

7	6	5	4	3	2	1	0
Alert_Mask	Mode	Reserved			Remote_En	WTC_En	Fault_Q
R/W-0h	R/W-0h	R-0h			R/W-1h	R/W-0h	R/W-1h

Table 8-9 Configuration Register Field Descriptions

Bit	Field	Type	Reset	Description
7	Alert_Mask	R/W	0h	Controls the functionality of the ALERT pin. This bit is set after reading an active alert and must be cleared for the ALERT pin to assert again. 0h = The ALERT pin is enabled 1h = The ALERT is masked and will not output a low
6	Mode	R/W	0h	Controls the operation mode of the device. 0h = Continuous mode enabled 1h = Shutdown mode enabled
5:3	Reserved	R	0h	Reserved
2	Remote_En	R/W	1h	Enables of disables the remote channel operation. 0h = The remote channel monitoring is disabled 1h = The remote channel monitoring is enabled
1	WTC_En	R/W	0h	Enables the override of the previously stored value for the critical temperature limits. 0h = T_CRIT Limit cannot be changed 1h = T_CRIT Limit can be changed
0	Fault_Q	R/W	1h	Configures the fault queue feature for the ALERT and T_CRIT pins. This only affects the remote channel. 0h = Fault queue is disabled, only 1 temperature result beyond the limits will trigger an ALERT or T_CRIT warning 1h = Fault queue is enabled, three successive temperature results beyond the limits will trigger an ALERT or T_CRIT warning

8.6.5 Conv_Period Register (Address = 04h or 0Ah) [reset = 08h]

This register is used to configure the conversion period of the device. Setting a reserved configuration will stop conversions but not change the device mode.

Return to Register Map.

Figure 8-20 Conv_Period Register

7	6	5	4	3	2	1	0
Reserved				Conv_Period[3:0]
R-0h				R/W-8h

Table 8-10 Conv_Period Register Field Descriptions

Bit	Field	Type	Reset	Description
7:4	Reserved	R	0h	Reserved
3:0	Conv_Period[3:0]	R/W	8h	Conversion period setting. This bit field changes the conversion period of the device at the next possible interval but will not restart an on-going conversion period. Writing an unsupported value to this setting will put the device in Shutdown mode. 0h = 16 s / 0.0625 Hz 1h = 8 s / 0.125Hz 2h = 4 s / 0.25 Hz 3h = 2 s / 0.5 Hz 4h = 1 s / 1 Hz 5h = 0.5 s / 2 Hz 6h = 0.25 s / 4 Hz 7h = 0.125 s / 8 Hz 8h = 0.0625 s / 16 Hz (default) 9h-Fh = Reserved

Bit

Field

Type

Reset

Description

7:4

Reserved

3:0

Conv_Period[3:0]

R/W

Conversion period setting. This bit field changes the conversion period of the device at the next possible interval but will not restart an on-going conversion period. Writing an unsupported value to this setting will put the device in Shutdown mode.

0h = 16 s / 0.0625 Hz

1h = 8 s / 0.125Hz

2h = 4 s / 0.25 Hz

3h = 2 s / 0.5 Hz

4h = 1 s / 1 Hz

5h = 0.5 s / 2 Hz

6h = 0.25 s / 4 Hz

7h = 0.125 s / 8 Hz

8h = 0.0625 s / 16 Hz (default)

9h-Fh = Reserved

8.6.6 THigh_Limit_Local Register (Address = 05h or 0Bh) [reset = 46h]

This register is used to configure Local temperature high limit. The default value 46h corresponds to a limit setting of 70°C.

Return to Register Map.

Figure 8-21 THigh_Limit_Local Register

7	6	5	4	3	2	1	0
THigh_Limit_Local[7:0]
R/W-46h

Table 8-11 THigh_Limit_Local Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	THigh_Limit_Local[7:0]	R/W	46h	8-bit local temperature alert high limit setting. Temperature alert high limit format is an 8-bit two's complement byte with a least significant bit equal to 1°C

8.6.7 THigh_Limit_Remote_MSB Register (Address = 07h or 0Dh) [reset = 46h]

This register is used to configure the high alert limit for the remote channel. The default value 460h corresponds to a limit setting of 70°C.

Return to Register Map.

Figure 8-22 THigh_Limit_Remote_MSB Register

7	6	5	4	3	2	1	0
THigh_Limit_Remote[10:3]
R/W-46h

Table 8-12 THigh_Limit_Remote_MSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	THigh_Limit_Remote[10:3]	R/W	46h	11-bit remote temperature alert high limit setting. Temperature alert high limit format is an 11-bit two's complement word with a least significant bit equal to 0.0125°C

8.6.8 TLow_Limit_Remote_MSB Register (Address = 08h or 0Eh) [reset = D8h]

This register is used to configure the low alert limit for the remote channel. The default value D8h corresponds to -40°C.

Return to Register Map.

Figure 8-23 TLow_Limit_Remote_MSB Register

7	6	5	4	3	2	1	0
Tlow_Limit_Remote[10:3]
R/W-D8h

Table 8-13 TLow_Limit_Remote_MSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	TLow_Limit_Remote[10:3]	R/W	D8h	11-bit remote temperature alert low limit setting. Temperature alert low limit format is an 11-bit two's complement word with a least significant bit equal to 0.0125°C

8.6.9 One_Shot Register (Address = 0Fh) [reset = 00h]

Write to this register to trigger a One Shot conversion in Shutdown Mode (that is, Bit 6 of the Configuration Register written to 1).

Return to Register Map.

Figure 8-24 One_Shot Register

7	6	5	4	3	2	1	0
One_Shot[7:0]
W-00h

Table 8-14 One_Shot Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	One_Shot[7:0]	W	00h	Writing any value to this register will trigger a One_Shot conversion while in Shutdown Mode. In continuous mode there will be no effect.

8.6.10 Temp_Remote_LSB Register (Address = 10h) [reset = 00h]

This register contains bits Temp_Remote[2:0] of the remote temperature result.

Return to Register Map.

Figure 8-25 Temp_Remote_LSB Register

7	6	5	4	3	2	1	0
Temp_Remote[2:0]			Reserved
R-0h			R-00h

Table 8-15 Temp_Remote_LSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:5	Temp_Remote[2:0]	R	0h	11-bit remote temperature channel conversion result Least Significant Byte Temperature data is represented by a 11-bit, two's complement word with a least significant bit equal to 0.125°C.
4:0	Reserved	R	00h	Reserved

8.6.11 Remote_Offset_MSB Register (Address = 11h) [reset = 00h]

This register contains the most significant byte of the remote channel offset. Use this register to input a static offset calibration for remote temperature measurements.

Return to Register Map.

Figure 8-26 Remote_Offset_MSB Register

7	6	5	4	3	2	1	0
Remote_Offset[10:3]
R/W-00h

Table 8-16 Remote_Offset_MSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Remote_Offset[10:3]	R/W	00h	11-bit remote temperature channel remote offset most significant byte Temperature data is represented by a 11-bit, two's complement word with a least significant bit equal to 0.125°C.

8.6.12 Remote_Offset_LSB Register (Address = 12h) [reset = 00h]

This register contains the least significant byte of the remote channel offset. Use this register to input a static offset calibration for remote temperature measurements.

Return to Register Map.

Figure 8-27 Remote_Offset_LSB Register

7	6	5	4	3	2	1	0
Remote_Offset[2:0]			Reserved
R/W-0h			R-00h

Table 8-17 Remote_Offset_LSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:5	Remote_Offset[2:0]	R/W	0h	11-bit remote temperature channel remote offset least significant byte Temperature data is represented by a 11-bit, two's complement word with a least significant bit equal to 0.125°C.
4:0	Reserved	R	00h	Reserved

8.6.13 THigh_Limit_Remote_LSB Register (Address = 13h) [reset = 00h]

This register is used to configure the high alert limit for the remote channel.

Return to Register Map.

Figure 8-28 THigh_Limit_Remote_LSB Register

7	6	5	4	3	2	1	0
THigh_Limit_Remote[2:0]			Reserved
R/W-0h			R-00h

Table 8-18 THigh_Limit_Remote_LSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:5	THigh_Limit_Remote[2:0]	R/W	0h	11-bit remote temperature alert high limit setting. Temperature alert high limit format is an 11-bit two's complement word with a least significant bit equal to 0.0125°C
4:0	Reserved	R	00h	Reserved

8.6.15 TLow_Limit_Remote_LSB Register (Address = 14h) [reset = 00h]

This register is used to configure the low alert limit for the remote channel.

Return to Register Map.

Figure 8-29 TLow_Limit_Remote_LSB Register

7	6	5	4	3	2	1	0
Tlow_Limit_Remote[2:0]			Reserved
R/W-0h			R-00h

Table 8-19 TLow_Limit_Remote_LSB Register Field Descriptions

Bit	Field	Type	Reset	Description
7:5	TLow_Limit_Remote[2:0]	R/W	0h	11-bit remote temperature alert low limit setting. Temperature alert low limit format is an 11-bit two's complement word with a least significant bit equal to 0.0125°C
4:0	Reserved	R	00h	Reserved

8.6.16 Alert_Mask Register (Address = 16h) [reset = 07h]

Controls which alerts are masked. Masking an alert prevents the ALERT pin from being asserted low.

Return to Register Map.

Figure 8-30 Alert_Mask Register

7	6	5	4	3	2	1	0
THigh_LA	Reserved		THigh_RA	TLow_RA	Reserved	TCrit_R	TCrit_L
R/W-0h	R-0h		R/W-0h	R/W-0h	R-1h	R/W-1h	R/W-1h

Table 8-20 Alert_Mask Register Field Descriptions

Bit	Field	Type	Reset	Description
7	THigh_LA	R/W	0h	Mask setting for THigh_LA 0h = THigh_LA is enabled to output the ALERT pin 1h = THigh_LA is masked and will not output a low on the ALERT pin
6:5	Reserved	R	0h	Reserved
4	THigh_RA	R/W	0h	Mask setting for THigh_RA 0h = THigh_RA is enabled to output the ALERT pin 1h = THigh_RA is masked and will not output a low on the ALERT pin
3	TLow_RA	R/W	0h	Mask setting for TLow_RA 0h = TLow_RA is enabled to output the ALERT pin 1h = TLow_RA is masked and will not output a low on the ALERT pin
2	Reserved	R	1h	Reserved
1	TCrit_R	R/W	1h	Mask setting for TCrit_R 0h = TCrit_R is enabled to output the ALERT pin 1h = TCrit_R is masked and will not output a low on the ALERT pin
0	TCrit_L	R/W	1h	Mask setting for TCrit_L 0h = TCrit_L is enabled to output the ALERT pin 1h = TCrit_L is masked and will not output a low on the ALERT pin

8.6.17 THigh_Crit_Remote Register (Address = 19h) [reset = XXh]

This register is used to configure the citical limit for the remote channel. The default value for this register is configured by the pull-up resistors through the ALERT and T_CRIT pins. Note the WTC_En bit in the Configuration register needs to be set to 1h before writting to this register.

Return to Register Map.

Figure 8-31 THigh_Crit_Remote Register

7	6	5	4	3	2	1	0
THigh_Crit_Remote[7:0]
R/W-XXh

Table 8-21 THigh_Crit_Remote Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	THigh_Crit_Remote[7:0]	R/W	XXh	8-bit remote temperature crit limit setting. Temperature crit limit format is an 8-bit two's complement word with a least significant bit equal to 1°C

8.6.18 THigh_Crit_Local Register (Address = 20h) [reset = XXh]

This register is used to configure the critical limit for the local channel. The default value for this register is configured by the pull-up resistors through the ALERT and T_CRIT pins. Note the WTC_En bit in the Configuration register needs to be set to 1h before writing to this register.

Return to Register Map.

Figure 8-32 THigh_Crit_Local Register

7	6	5	4	3	2	1	0
THigh_Crit_Local[7:0]
R/W-XXh

Table 8-22 THigh_Crit_Local Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	THigh_Crit_Local[7:0]	R/W	XXh	8-bit local temperature crit limit setting. Temperature crit limit format is an 8-bit two's complement word with a least significant bit equal to 1°C

8.6.19 Crit_Hysteresis Register (Address = 21h) [reset = 0Ah]

This register is used to configure the critical hysteresis for both remote and local channels. The value for this register is a 5-bit integer value with a least significant bit equal to 1°C. Default value is 10°C.

Return to Register Map.

Figure 8-33 Crit_Hysteresis Register

7	6	5	4	3	2	1	0
Reserved			Crit_Hysteresis[4:0]
R-0h			R/W-0Ah

Table 8-23 Crit_Hysteresis Register Field Descriptions

Bit	Field	Type	Reset	Description
7:5	Reserved	R	0h	Reserved
4:0	Crit_Hysteresis[4:0]	R/W	0Ah	5-bit temperature critical hysteresis. Temperature crit hysteresis format is an 5-bit integer byte with a least significant bit equal to 1°C

8.6.20 Log1 Register (Address = 2Dh) [reset = 00h]

This register is available as a general purpose log register. This register will have no impact on device operation.

Return to Register Map.

Figure 8-34 Log1 Register

7	6	5	4	3	2	1	0
Log1[7:0]
R/W-00h

Table 8-24 Log1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Log1[7:0]	R/W	0h	General purpose data log.

8.6.21 Log2 Register (Address = 2Eh) [reset = 00h]

This register is available as a general purpose log register. This register will have no impact on device operation.

Return to Register Map.

Figure 8-35 Log2 Register

7	6	5	4	3	2	1	0
Log2[7:0]
R/W-00h

Table 8-25 Log2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Log2[7:0]	R/W	0h	General purpose data log.

8.6.22 Log3 Register (Address = 2Fh) [reset = 00h]

This register is available as a general purpose log register. This register will have no impact on device operation.

Return to Register Map.

Figure 8-36 Log3 Register

7	6	5	4	3	2	1	0
Log3[2:0]
R/W-00h

Table 8-26 Log3 Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Log3[7:0]	R/W	0h	General purpose data log.

8.6.23 Filter_Alert_Mode Register (Address = BFh) [reset = 00h]

This register controls the remote diode filter level and the alert mode of operation.

Return to Register Map.

Figure 8-37 Filter_Alert_Mode Register

7	6	5	4	3	2	1	0
Reserved					Filter_Level[1:0]		Alert_Mode
R-00h					R/W-0h		R/W-0h

Table 8-27 Filter_Alert_Mode Register Field Descriptions

Bit	Field	Type	Reset	Description
7:3	Reserved	R	0h	Reserved
2:1	Filter_Level[1:0]	R/W	0h	Controls the filter level. The filter is a moving average of the Remote temperature conversion results. 0h = 0 moving average 1h = 4 moving average 2h = 4 moving average 3h = 8 moving average
0	Alert_Mode	R/W	0h	Controls the ALERT pin mode of operation 0h = Interrupt or SMBus Alert mode 1h = Comparator mode

Bit

Field

Type

Reset

Description

7:3

Reserved

2:1

Filter_Level[1:0]

R/W

Controls the filter level. The filter is a moving average of the Remote temperature conversion results.

0h = 0 moving average

1h = 4 moving average

2h = 4 moving average

3h = 8 moving average

Alert_Mode

R/W

Controls the ALERT pin mode of operation

0h = Interrupt or SMBus Alert mode

1h = Comparator mode

8.6.24 Chip_ID Register (Address = FDh) [reset = 50h]

This register contains the Chip ID for identifying the device.

Return to Register Map.

Figure 8-38 Chip_ID Register

7	6	5	4	3	2	1	0
Chip_ID[7:0]
R-50h

Table 8-28 Chip_ID Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Chip_ID[7:0]	R	50h	Chip ID of the device.

8.6.25 Vendor_ID Register (Address = FEh) [reset = 60h]

This register contains the Vendor ID for identifying the device.

Return to Register Map.

Figure 8-39 Vendor_ID Register

7	6	5	4	3	2	1	0
Vendor_ID[7:0]
R-60h

Table 8-29 Vendor_ID Register Field Descriptions

Bit	Field	Type	Reset	Description
7:0	Vendor_ID[7:0]	R	60h	Vendor ID of the device.

8.6.26 Device_Rev_ID Register (Address = FFh) [reset = 91h]

This register contains the Device and Revision ID for identifying the device.

Return to Register Map.

Figure 8-40 Device_Rev_ID Register

7	6	5	4	3	2	1	0
Device_ID[3:0]				Rev_ID[3:0]
R-9h				R-0h

Table 8-30 Device_Rev_ID Register Field Descriptions

Bit	Field	Type	Reset	Description
7:4	Device_ID[3:0]	R	9h	Device ID of the device.
3:0	Rev_ID[3:0]	R	1h	Revision ID of the device.