DS90UB947-Q1 Datasheet, PDF (56/81 Pages) Texas Instruments – 1080p OpenLDI to FPD-Link III Serializer

DS90UB947-Q1
SNLS454 – NOVEMBER 2014
ADD
(dec)
92
ADD
(hex)
0x5C
Register Name
DUAL_CTL2
93
0x5D FREQ_LOW
94
0x5E FREQ_HIGH
95
0x5F OpenLDI Frequency
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Table 10. Serial Control Bus Registers (continued)
Bit(s)
7
6
5
4:3
2:0
7
6
5:0
7
6:0
7:0
Register
Type
RW
RW
RW
RW
RW
RW
RW
RW
R
Default
(hex)
0x00
0x02
0x00
0x06
44
0x00
Function
Description
DISABLE_DUAL Disable Dual Swap: Prevents automatic correction of swapped Dual
_SWAP
link connection. Setting this bit allows writes to the DUAL_SWAP
control in the DUAL_CTL1 register.
FORCE_LINK_R Force Link Ready.
DY
Forces link ready indication, bypassing back channel link detection.
FORCE_CLK_D
ET
Force Clock Detect.
Forces the OpenLDI clock detect circuit to indicate presence of a valid
input clock. This bypasses the clock detect circuit, allowing operation
with an input clock that does not meet frequency or stability
requirements.
FREQ_STBL_T
HR
Frequency Stability Threshold: The Frequency detect circuit can be
used to detect a stable clock frequency. The Stability Threshold
determines the amount of time required for the clock frequency to stay
within the FREQ_HYST range to be considered stable:
00 : 160us.
01 : 640us.
10 : 1.28ms.
11 : 2.55ms.
FREQ_HYST
Frequency Detect Hysteresis: The Frequency detect hysteresis setting
allows ignoring minor fluctuations in frequency. A new frequency
measurement will be captured only if the measured frequency differs
from the current measured frequency by more than the FREQ_HYST
setting. The FREQ_HYST setting is in MHz.
Reserved.
OLDI_RST_MO OLDI Phy Reset Mode:
DE
0 : Reset OLDI Phy on change in mode or frequency.
1 : Don't reset OLDI Phy on change in mode or frequency.
FREQ_LO_THR Frequency Low Threshold: Sets the low threshold for the OLDI Clock
frequency detect circuit in MHz. This value is used to determine if the
OLDI clock frequency is too low for proper operation.
Reserved.
FREQ_HI_THR Frequency High Threshold: Sets the high threshold for the OLDI Clock
frequency detect circuit in MHz.
OLDI_FREQ
OLDI Pixel Frequency:
Returns the value of the OLDI pixel Frequency of the video data. This
register indicates the pixel rate for the incoming data. If the OLDI
interface is in single-pixel mode, the pixel frequency is the same as
the OLDI frequency. If the OLDI interface is in dual-pixel mode, the
pixel frequency is 2x the OLDI frequency. A value of 0 indicates the
OLDI receiver is not detecting a valid signal.
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