DS90UH949-Q1 Datasheet, PDF (57/87 Pages) Texas Instruments – 1080p HDMI to FPD-Link III Bridge Serializer with HDCP

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DS90UH949-Q1
SNLS453 – NOVEMBER 2014
Register Maps (continued)
ADD
(dec)
91
ADD
(hex)
0x5B
Register Name
DUAL_CTL1
Bit(s)
7
6
5
4
3
2
1
0
Table 10. Serial Control Bus Registers (continued)
Register
Type
RW
RW
RW
RW
RW
RW
RW
RW
Default
(hex)
Strap
0
1
0
0
0
0
0
Function
Description
FPD3_COAX_ FPD3 Coax Mode: Enables configuration for the FPD3 Interface cabling type.
MODE
0 : Twisted Pair.
1 : Coax This bit is loaded from the MODE_SEL1 pin at power-up.
DUAL_SWAP Dual Swap Control: Indicates current status of the Dual Swap control. If automatic
correction of Dual Swap is disabled via the DISABLE_DUAL_SWAP control, this bit may
be modified by software.
RST_PLL_FR Reset FPD3 PLL on Frequency Change: When set to a 1, frequency changes detected
EQ
by the Frequency Detect circuit will result in a reset of the FPD3 PLL.
FREQ_DET_P
LL
Frequency Detect Select PLL Clock: Determines the clock source for the Frequency
detection circuit:
0 : HDMI clock (prior to PLL).
1: HDMI PLL clock.
DUAL_ALIGN_ Dual align on DE (valid in dual-link mode):
DE
0: Data will be sent on alternating links without regard to odd/even pixel position.
1: Odd/Even data will be sent on the primary/secondary links, respectively, based on the
assertion of DE.
DISABLE_DU
AL
Disable Dual Mode: During Auto-detect operation, setting this bit to a 1 will disable Dual
FPD-Link III operation.
0: Normal Auto-detect operation.
1: Only Single or Replicate operation supported.
This bit will have no effect if FORCE_LINK is set.
FORCE_DUAL Force dual mode:
When FORCE_LINK bit is set, the value on this bit controls single versus dual operation:
0: Single FPD-Link III Transmitter mode.
1: Dual FPD-Link III Transmitter mode.
FORCE_LINK
Force Link Mode: Forces link to dual or single mode, based on the FORCE_DUAL control
setting. If this bit is 0, mode setting will be automatically set based on downstream device
capabilities as well as the incoming data frequency.
0 : Auto-Detect FPD-Link III mode.
1 : Forced Single or Dual FPD-Link III mode.
Copyright © 2014, Texas Instruments Incorporated
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