SLUSBX9I March 2014 – July 2019 TPS23861
PRODUCTION DATA.
Command = 66h with 2 Data Byte (LSByte first, MSByte second), Read Only
LSB: 66h
BITS | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
---|---|---|---|---|---|---|---|---|
BIT NAME | Port 4 Resistance[7:0] | |||||||
RESET or POR VALUE | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
MSB: 67h
BITS | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
---|---|---|---|---|---|---|---|---|
BIT NAME | RS4[1:0] | Port 4 Resistance[13:8] | ||||||
RESET or POR VALUE | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bit Descriptions
Most recent 2 point detection resistance measurement. The resistance value shown is usable only if RSn[1:0] are at 00 or 01. The I2C data transmission is a 2 byte transfer.
Port n Resistance[13:0]: 14-bit data conversion result of detection resistance for port n. The equation defining the resistance measured is:
where
USEABLE RESISTANCE RANGE | LSB VALUE |
---|---|
500 Ω to 55 kΩ | 11.0966 Ω |
RSn[1:0]: Most recent detection result status on port n. If the state is 00, the 14-bit resistance value is calculated with a bit weight of 11.0966 Ω/bit. If the state is 01, two additional detection fingers have been performed at higher detection currents (270 µA and 540 µA) in order to better measure the lower port impedance. The 14-bit resistance value is calculated with a bit weight of 4.625 Ω/bit in this case. The detection result is maintained in the register in any operating mode following the detection.
RSn1 | RSn0 | DETECT STATUS | RSTEP BIT WEIGHT |
---|---|---|---|
0 | 0 | Other | 11.0966 Ω/bit |
0 | 1 | Low (< 2 kΩ) | Additional detect 4.625 Ω/bit |
1 | 0 | Open circuit | N/A |
1 | 1 | MOSFET short fault | N/A |