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2-3 System switch output
The outputs from pins 41 to 44 of the CPU select the colour system and the outputs from pins
36 to 40 the SIF system. These outputs drive the colour and SIF system switching circuits.
The operation of each switching circuit is shown in the tables below.
Colour system switching output
Colour system
Output pins
Display
44
43
42
41
Auto
LHHL
Auto
PAUNTSC4.43
LLHH
PAUNTSC4.43
SECAM
HLHL
SECAM
NTSC
LHLH
NTSC
SIF system switching output
1. Multi system(SIF
system a option)
SIF system
I
Output pins
Display
I
40
39
38
37
36
I
Auto
5.5 MHZ
6.OMHZ
6.5MHz
HHHL
S1
LHLLL
S2
LLHLL
S3
LLLHL
S4
4.5 MHZ
IHLLLLIS5
It
depends
on receiving TV system
2.
China, Px. (SIF system b option)
SIF system
Auto
5.5 MHZ
6.OMHZ
4.5 MHZ
Output pins
I
Display
I
40
39
38
37
36 I
I
HHLL
S1
LHLLL
S2
LLHLL
S3
HLLL
LIS4
I
It dependson receivingTV
system
.
3. Indonesia (SIF system c option)
SIF system
Output pins
Display
40
39
38
37
36
Auto
HHLL
S1
5.5MHZ
LHLLL
S2
4.5 MHZ
HLLLL
S3
It depends on receiving TV system
-10-
A7-A
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