ch7005c Chrontel, ch7005c Datasheet - Page 35

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ch7005c

Manufacturer Part Number
ch7005c
Description
Digital Pc To Tv Encoder With Macrovisiontm
Manufacturer
Chrontel
Datasheet

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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 CH7005 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”.
201-0000-025 Rev. 2.9, 6/24/2004
Table 28. FSCI Values (525-Line Modes)
Bit:
Symbol:
Type:
Default:
Mode
10
11
12
16
17
18
22
23
24
26
28
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”
1,073,741,824
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”
1,073,746,319
763,366,524
623,156,346
574,432,187
463,964,459
516,988,968
452,365,347
623,156,346
545,261,803
521,960,016
469,764,015
428,556,645
569,410,927
646,236,211
508,911,016
NTSC
3
FSCI#
R/W
2
FSCI#
R/W
“Normal Dot Crawl
Symbol: FSCI
Address: 18H - 1FH
Bits: 4 or 8 each
1
FSCI#
R/W
1,072,561,888
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
568,782,819
428,083,911
PAL-M
CH7005C
0
FSCI#
R/W
35

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