DS90UB926Q-Q1 Datasheet, PDF (35/57 Pages) Texas Instruments – 5- to 85-MHz 24-Bit Color FPD-Link III Deserializer With Bidirectional Control Channel

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DS90UB926Q-Q1
SNLS422B – JULY 2012 – REVISED JANUARY 2015
Register Maps (continued)
ADD
(dec)
6
7
8
9
ADD Register
(hex) Name
0x06 I2C Control [2]
0x07 Remote
Device ID
0x08 SlaveID[0]
0x09 SlaveID[1]
Table 11. Serial Control Bus Registers (continued)
Bit(s)
7
6
5
4:3
2
1
0
7:1
0
7:1
0
7:1
0
Register
Type
R
RW
RW
RW
RW
RW
RW
RW
RW
RW
Default Function
(hex)
Descriptions
0x00
Forward
Channel
Sequence
Error
Control Channel Sequence Error Detected It indicates a
sequence error has been detected in forward control
channel. It this bit is set, an error may have occurred in the
control channel operation.
Clear
Sequence
Error
It clears the Sequence Error Detect bit
This bit is not self-clearing.
Reserved
SDA Output
Delay
SDA Output 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
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
I2C Bus
Timer
Speed
Speed up I2C Bus Watchdog Timer
1: Timer expires after approximately 50 ms
0: Timer expires after approximately 1s
I2C Bus
Timer
Disable
Disable I2C Bus Timer When the I2C Timer may be used
to detect when the I2C bus is free or hung up following an
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 try to clear the bus by driving 9 clocks on
SCL
0x18
Remote ID
Remote 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 through 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.
Freeze
Device ID
Freeze Serializer 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
0x00
Target
Slave
Device ID0
7-bit Remote Slave Device ID 0
Configures the physical I2C address of the remote I2C
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.
Reserved
0x00
Target
Slave
Device ID1
7-bit Remote Slave Device ID 1
Configures the physical I2C address of the remote I2C
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.
Reserved
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