Closed-Caption Decoder
Closed-Caption Decoder Registers
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company

243

Panasonic

FQSEL: Frequency Select Register x’007EC2’

(FQSELW x’007EE2’)

In this register, set the sampling cycle for separating the HSYNC and VSYNC signals from the composite sync signal. The recommended setting is x’1F01’.

VFQDIV[5:0]: Sampling frequency setting for VSYNC separator

In this field, set the ratio by which to divide the sampling frequency for the HSYNC separator.

FQDIV[3:0]: Sampling frequency setting for HSYNC separator

In this field, set the ratio by which to divide the A/D sampling frequency.

SCMING: Minimum Sync Level Detection Interval Set Register x’007EC4’

(SCMINGW x’007EE4’)

SCMING[9:0]: Interval setting for the minimum sync level detection

Set the HSYNC cycle in this field in ADC clock units. This is the interval used for detecting the sync tip level for sync tip clamping. The valid range is x’000’ to x’3FF’. Note that the HSYNC cycle set in this register is only used for detecting the minimum sync level. You must also set the correc-tion HSYNC cycle in HSEP1.For the NTSC format, the setting for this register is x’02FA’, calculated as follows:(A/D sampling frequency) × (HSYNC cycle) = 12 MHz × 63 µs = x’02FA

BPPST: Backporch Position Register x’007EC6’

(BPPSTW x’007EE6’)

BPPST[8:0]: Backporch start position for the leading edge of HSYNC

Bit:1514131211109876543210
——
VFQ
DIV5 VFQ
DIV4 VFQ
DIV3 VFQ
DIV2 VFQ
DIV1 VFQ
DIV0 ————FQ
DIV3 FQ
DIV2 FQ
DIV1 FQ
DIV0
Reset:0011111100000001
R/W: R R R/W R/W R/W R/W R/W R/W R R R R R/W R/W R/W R/W
Bit:1514131211109876543210
——————SC
MING
9
SC
MING
8
SC
MING
7
SC
MING
6
SC
MING
5
SC
MING
4
SC
MING
3
SC
MING
2
SC
MING
1
SC
MING
0
Reset:0000001100000000
R/W:RRRRRRR/WR/WR/WR/WR/WR/WR/WR/WR/WR/W
Bit:1514131211109876543210
———————BP
PST8 BP
PST7 BP
PST6 BP
PST5 BP
PST4 BP
PST3 BP
PST2 BP
PST1 BP
PST0
Reset:0000000000111100
R/W:RRRRRRRR/WR/WR/WR/WR/WR/WR/WR/WR/W