ch7003b-v Chrontel, ch7003b-v Datasheet - Page 43

• Manufacturer Part Number: ch7003b-v
• Description: Ch7003 Digital Pc To Tv Encoder
• Manufacturer: Chrontel

CHRONTEL
When the CH7003 is operating in the slave clock mode, the ACIV bit in register 21H should be set to "1" and the
CFRB bit in register 06H should be set to “0”.
*Note: For reduced cross-color and cross-luminance artifacts, a value of 488,265,597 can be used with CFRB = "0"
PLL Control Register
The following PLL and memory controls are available through the PLL control register:
MEM5V
PLL5VA
PLL5VD
PLLS
PLLCAP
PLLCPI
201-0000-023 Rev. 4.2, 4/12/2002
Table 30. FSCI Values (625-Lines Modes)
Bit:
Symbol:
Type:
Default:
Mode
13
14
15
19
20
21
0
1
4
5
8
9
& ACIV = "0".
7
MEM5V is set to 1 when the memory supply is 5 volts. The default value of 0 is used when the
memory supply is 3.3 volts.
PLL5VA is set to 1 when the phase-locked loop analog supply is 5 volts (default). A value of 0 is
used when the phase-locked loop analog supply is 3.3 volts.
PLL5VD is set to 1 when the phase-locked loop digital supply is 5 volts. A value of 0 is used when
the phase-locked loop digital supply is 3.3 volts (default).
PLLS controls the number of stages used in the PLL. When the PLL5VA is 1 (5V analog PLL
supply) PLLS should be 1, and seven stages are used. When PLL5VA is 0 (3.3V analog PLL
supply) PLLS shold be 0, and five stages are used.
PLLCAP controls the loop filter capacitor of the PLL. A recommended listing of PLLCAP vs.
Mode is shown in Table 30.
PLLCHI controls the charge pump current of the PLL. The default value of 0 should be used.
"Normal Dot Crawl"
6
488,262,757*
806,021,060
644,816,848
601,829,058
485,346,014
677,057,690
537,347,373
806,021,060
644,816,848
537,347,373
645,499,916
528,951,320
PAL
5
PLLCPI
R/W
0
4
PLLCAP
R/W
0
3
PLLS
R/W
1
"Normal Dot Crawl"
651,209,077
520,967,262
392,125,896
547,015,625
434,139,385
651,209,077
520,967,262
434,139,385
521,519,134
427,355,957
394,482,422
486,236,111
PAL-N
2
PLL5VD
0
R/W
Symbol: PLLC
Address: 20H
Bits: 6
1
PLL5VA
R/W
1
CH7003B
0
MEM5V
R/W
0
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