ch7005c Chrontel, ch7005c Datasheet - Page 39

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

CHRONTEL
Calculated Increment Value Register
The CIV registers 22H through 24H contain a 26-bit value, which is the calculated increment value that should be
used as the upper 26 bits of FSCI. This value is determined by a comparison of the pixel clock and the 14MHz
clock. The bit locations and calculation of CIV are specified as the following:
Register
21H
22H
23H
24H
Version ID Register
This read-only register contains a 8-bit value indicating the identification number assigned to this version of the
CH7005. The default value shown is pre-programmed into this chip and is useful for checking for the correct
version of this chip, before proceeding with its programming.
Address Register
The Address Register points to the register currently being accessed.
201-0000-025 Rev. 2.9, 6/24/2004
Bit:
Symbol:
Type:
Default:
Bit:
Symbol:
Type:
Default:
Bit:
Symbol:
Type:
Default:
7
R
0
7
R
0
7
CIV#
VID7
Contents
CIV[25:24]
CIV[23:16]
CIV[15:8]
CIV[7:0]
6
CIV#
R
0
6
VID6
R
0
6
5
CIV#
R
0
5
VID5
R
1
5
AR5
R/W
X
4
CIV#
R
0
VID4
4
R
1
4
AR4
R/W
X
3
CIV#
R
0
3
VID3
R
1
3
R/W
X
AR3
2
VID2
R
0
2
AR2
R/W
X
2
CIV#
R
0
Symbol: CIV
Address: 22H - 24H
Bits: 8
Symbol: VID
Address: 25H
Bits: 8
Symbol: AR
Address: 3FH
Bits: 6
1
VID1
R
1
1
AR1
R/W
X
1
CIV#
R
0
CH7005C
0
VID0
R
0
0
AR0
R/W
X
0
CIV#
R
0
39