DS90UH947-Q1 Datasheet, PDF (55/87 Pages) Texas Instruments – 1080p OpenLDI to FPD-Link III Serializer with HDCP

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ADD
(dec)
91
ADD
(hex)
0x5B
Register Name
DUAL_CTL1
DS90UH947-Q1
SNLS455 – NOVEMBER 2014
Table 10. Serial Control Bus Registers (continued)
Bit(s)
7
6
5
4
3
2
1
0
Register
Type
RW
RW
RW
RW
RW
RW
RW
RW
Default
(hex)
Strap
0x20
Function
Description
FPD3_COAX_M
ODE
FPD-Link III Coax Mode: Enables configuration for the FPD-Link III
Interface cabling type:
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_FREQ Reset FPD-Link III PLL on Frequency Change: When set to a 1,
frequency changes detected by the Frequency Detect circuit will result
in a reset of the FPD3 PLL.
FREQ_DET_PLL Frequency Detect Select PLL Clock. Determines the clock source for
the Frequency detection circuit:
0 : OpenLDI clock (prior to PLL).
1: OpenLDI PLL clock.
DUAL_ALIGN_D
E
Dual Align on DE: In dual-link mode, if this bit is set to a 1, the
odd/even data will be sent on the primary/secondary links
respectively, based on the assertion of DE. If this bit is set to a 0, data
will be sent on alternating links without regard to odd/even pixel
position.
DISABLE_DUAL
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.
1 : Forced Single or Dual FPD-Link III mode.
0 : Auto-Detect FPD-Link III mode.
Copyright © 2014, Texas Instruments Incorporated
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