Datasheet

DS90UH926Q
www.ti.com SNLS337J –OCTOBER 2010–REVISED APRIL 2013
Table 9. Serial Control Bus Registers (continued)
ADD ADD Register Bit(s) Register Default Function Descriptions
(dec) (hex) Name Type (hex)
6 0x06 I2C Control [2] 7 R 0x00 Forward Control Channel Sequence Error Detected It indicates a
Channel sequence error has been detected in forward control
Sequence channel. It this bit is set, an error may have occurred in the
Error control channel operation.
6 RW Clear It clears the Sequence Error Detect bit
Sequence This bit is not self-clearing.
Error
5 Reserved
4:3 RW SDA Output SDA Output Delay
Delay This field configures output delay on the SDA output.
Setting this value will increase output delay in units of 50
ns. Nominal output delay values for SCL to SDA are:
00 : 250ns
01: 300ns
10: 350ns
11: 400ns
2 RW Local Write Disable Remote Writes to Local Registers through
Serializer (Does not affect remote access to I2C slaves at
Deserializer)
1: Stop remote write to local device registers
0: remote write to local device registers
1 RW I2C Bus Speed up I2C Bus Watchdog Timer
Timer 1: Timer expires after approximately 50 ms
Speed 0: Timer expires after approximately 1s
0 RW I2C Bus Disable I2C Bus Timer When the I2C Timer may be used
Timer to detect when the I2C bus is free or hung up following an
Disable invalid termination of a transaction. If SDA is high and no
signalling occurs for approximately 1 s, the I2C bus is
assumed to be free. If SDA is low and no signaling occurs,
the device will attempt to clear the bus by driving 9 clocks
on SCL
7 0x07 Remote 7:1 RW 0x18 Remote ID Remote ID
Device ID Configures the I2C Slave ID of the remote Serializer. A
value of 0 in this field disables I2C access to remote
Serializer. This field is automatically configured via the
Serializer Forward Channel. Software may overwrite this
value, but should also set the FREEZE DEVICE ID bit to
prevent overwriting by the Forward Channel.
0 RW Freeze Freeze Serializer Device ID
Device ID 1: Prevent auto-loading of the Serializer Device ID from the
Forward Channel. The ID will be frozen at the value
written.
0: Update
8 0x08 SlaveID[0] 7:1 RW 0x00 Target 7-bit Remote Slave Device ID 0
Slave Configures the physical I2C address of the remote I2C
Device ID0 Slave device attached to the remote Serializer. If an I2C
transaction is addressed to the Slave Alias ID0, the
transaction will be remapped to this address before
passing the transaction across the Bidirectional Control
Channel to the Serializer.
0 Reserved
9 0x09 SlaveID[1] 7:1 RW 0x00 Target 7-bit Remote Slave Device ID 1
Slave Configures the physical I2C address of the remote I2C
Device ID1 Slave device attached to the remote Serializer. If an I2C
transaction is addressed to the Slave Alias ID1, the
transaction will be remapped to this address before
passing the transaction across the Bidirectional Control
Channel to the Serializer.
0 Reserved
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