msm7654 Oki Semiconductor, msm7654 Datasheet - Page 42

• Manufacturer Part Number: msm7654
• Description: Ntsc/pal Digital Video Encoder
• Manufacturer: Oki Semiconductor

GENLOCK FUNCTIONS
The functions of GENLOCK pin either in the master mode or in the slave mode are described
¡ Semiconductor
below.
Master mode
Operation
Slave mode
mode
(External GENLOCK: valid)
(External GENLOCK: valid)
(Internal register: valid)
(Internal register: valid)
GENLOCK Functions in Master Mode or in Slave Mode
MR1[0]
0
1
0
1
(GENLOCK OFF)
(GENLOCK OFF)
(GENLOCK OFF)
(GENLOCK OFF)
(GENLOCK ON)
(GENLOCK ON)
(GENLOCK ON)
(GENLOCK ON)
MR1[1]
0
1
0
1
0
1
0
1
Output mode
Output mode
Output mode
Output mode
Input mode
Input mode
Input mode
Input mode
A pulse that is input to the GENLOCK pin resets
the subcarrier phase.
GENLOCK OFF invalidates pulses that are input
to the GENLOCK pin.
The internal register resets the subcarrier phase.
External timing is ignored.
GENLOCK OFF does not reset the subcarrier
phase. External timing is ignored.
An external pin can output pulses to reset the
subcarrier phase. GENLOCK ON resets the
subcarrier phase and its reset timing is output.
An external pin can output pulses to reset the
subcarrier phase.GENLOCK OFF does not reset
the subcarrier phase and its reset timing is not
output.
An external pin cannot output pulses.
GENLOCK ON with MR1[1] resets the subcarrier
phase but its reset timing is not output.
An external pin cannot output pulses.
GENLOCK OFF does not reset the subcarrier
phase and its reset timing is not output.
GENLOCK Function
MSM7654
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