SNLU269 april   2023 SN75LVPE3410

 

  1.   Abstract
  2. 1Access Method
    1. 1.1 Register Programming Through SMBus
  3. 2Register Types
    1. 2.1 Channel Control Share Registers
  4. 3Example Programming Sequences
    1. 3.1 Single Channel Write Selection
    2. 3.2 Broadcast Write Selection
    3. 3.3 Set CTLE Gain Level
    4. 3.4 Set CTLE DC Gain Level
    5. 3.5 Set VOD Level
  5. 4Share Registers
  6. 5Channel Registers
  7. 6References

2.1 Channel Control Share Registers

There are two share registers for the SN75LVPE3410 channel control:

  • 0xFC – This registers is used for channel selection.
  • 0xFF – This register is used to select between the channel and share register sets. This register can also be used to enable broadcast writes to quickly configure settings that are common to all channels.

Register 0xFC is used to select which channel register sets are later written to. To select a channel register set, write a 1 to its corresponding bit in this global register. Note that more than one channel may be written to by setting multiple bits in register 0xFC. When performing an SMBus read transaction, however, only one channel can be selected at a time. If multiple channels are selected when attempting to perform an SMBus read, the device will return 0xFF. This functionality is important to note when using read-modify-write transactions.

Table 2-1 Channel Select Control Register Definition
Global RegisterBitDescription
0xFC7Reserved
6Reserved
5Reserved
4Reserved
3Select register set for channel 3.
2Select register set for channel 2.
1Select register set for channel 1.
0Select register set for channel 0.

Register 0xFF bit 0 is used to select the Channel Register Page for the channels selected in Register 0xFC.

Table 2-2 Register Page Select Register Definition
Global RegisterBitDescription
0xFF7:2Reserved
1

1: Broadcast write to all channels, 0xFF [0] must be set to 1. Select a single channel in 0xFC.

0: Normal operation, select channel register as defined in 0xFC.
0

1: Select Channel Registers.

0: Deselect Channel Registers. Select Share Register Page.