ch7007a Chrontel, ch7007a Datasheet - Page 34

• Manufacturer Part Number: ch7007a
• Description: Ch7007a Digital Pc To Tv Encoder
• Manufacturer: Chrontel

CHRONTEL
Subcarrier Value Registers
The lower four bits of registers 18H through 1FH contain a 32-bit value which is used as an increment value for the
ROM address generation circuitry. The bit locations are specified as the following:
Register
18H
19H
1AH
1BH
1CH
1DH
1EH
1FH
When the CH7007 is operating in the master clock mode, the tables below should be used to set the FSCI registers.
When using these values, the ACIV bit in register 21H should be set to “0” and the CFRB bit in register 06H should
be set to “1”.
34
Table 24. FSCI Values (525-Line Modes)
Bit:
Symbol:
Type:
Default:
Mode
10
12
16
17
18
22
23
24
26
11
2
3
6
7
7
Contents
FSCI[31:28]
FSCI[27:24]
FSCI[23:20]
FSCI[19:16]
FSCI[15:12]
FSCI[11:8]
FSCI[7:4]
FSCI[3:0]
“Normal Dot Crawl”
763,363,328
623,153,737
574,429,782
463,962,517
646,233,505
516,986,804
452,363,454
623,153,737
545,259,520
508,908,885
521,957,831
469,762,048
428,554,851
569,408,543
6
NTSC
5
4
“No Dot Crawl”
763,366,524
623,156,346
574,432,187
463,964,459
646,236,211
516,988,968
452,365,347
623,156,346
545,261,803
508,911,016
521,960,016
469,764,015
428,556,645
569,410,927
NTSC
3
FSCI#
R/W
201-0000-002
2
FSCI#
R/W
“Normal Dot Crawl”
Address: 18H - 1FH
Bits: 4 or 8 each
Symbol: FSCI
1
FSCI#
R/W
762,524,467
622,468,953
573,798,541
463,452,668
645,523,358
516,418,687
451,866,351
622,468,953
544,660,334
508,349,645
521,384,251
469,245,826
428,083,911
568,782,819
Rev. 2.95, 6/24/2004
PAL-M
CH7007A
0
FSCI#
R/W