DS90UH947-Q1 Datasheet, PDF (39/87 Pages) Texas Instruments – 1080p OpenLDI to FPD-Link III Serializer with HDCP

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ADD
(dec)
5
ADD
(hex)
0x05
Register Name
I2C Control
6
0x06 DES ID
DS90UH947-Q1
SNLS455 – NOVEMBER 2014
Table 10. Serial Control Bus Registers (continued)
Bit(s)
7:5
4:3
2
1
0
7:1
0
Register
Type
RW
RW
RW
RW
RW
RW
Default
(hex)
0x00
0x00
Function
SDA Output
Delay
Local Write
Disable
I2C Bus Timer
Speedup
I2C Bus Timer
Disable
DES Device ID
Port0/Port1
Freeze Device
ID
Port0/Port1
Description
Reserved.
Configures output delay on the SDA output. Setting this value will
increase output delay in units of 40ns.
Nominal output delay values for SCL to SDA are:
00: 240ns (default).
01: 280ns.
10: 320ns.
11: 360ns.
Disable remote writes to local registers. Setting this bit to 1 will
prevent remote writes to local device registers from across the control
channel. This prevents writes to the Serializer registers from an I2C
master attached to the Deserializer. Setting this bit does not affect
remote access to I2C slaves at the Serializer.
0: Enable (default).
1: Disable.
Speed up I2C bus Watchdog Timer.
0: Watchdog Timer expires after approximately 1s (default).
1: Watchdog Timer expires after approximately 50µs.
Disable I2C bus Watchdog Timer. The I2C Watchdog 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 signaling occurs for
approximately 1s, the I2C bus will be 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.
0: Enable (default).
1: Disable.
7-bit I2C address of the remote Deserializer. A value of 0 in this field
disables I2C access to the remote Deserializer. This field is
automatically configured by the Bidirectional Control Channel once RX
Lock has been detected. Software may overwrite this value, but
should also assert the FREEZE DEVICE ID bit to prevent overwriting
by the Bidirectional Control Channel.
If PORT1_SEL is set, this field refers to Port1 operation.
Freeze Deserializer Device ID.
1: Prevents auto-loading of the Deserializer Device ID by the
Bidirectional Control Channel. The ID will be frozen at the value
written.
0: Allows auto-loading of the Deserializer Device ID from the
Bidirectional Control Channel.
If PORT1_SEL is set, this field refers to Port1 operation.
Copyright © 2014, Texas Instruments Incorporated
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