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CPU PORT FUNCTIONS
Pin No.
Function Name
1
RC IN
2
RESET
3
50/60
4
H-BLK
5
V-BLK
6
AV-SW2
7
AV-SW1
8
KEY IN
9
H-P
10
RELAY
11
PROTECT
12
HP-MUTE
13
BBE
14
?
15
B-OUT
16
G-OUT
17
R-OUT
18
FB-OUT
19
SDA
20
SCL
21
VDD
22
23
24
25
AVDD3
26
TEST0
27
MCFM
28
29
TXCF
30
31
AVDD2
32
33
34
35
36
37
38
PXFM
39
VDDA
40
H-SYNC
41
V-SYNC
42
ACK
43
STATUS
44
INGNOR
45
MUTE
46
L/L'
47
LED
48
S-VHS-SW
49
H-PHASE
50
OSC
C5KEV
Function
RC Signal Input
Reset Input
50/60Hz output 50Hz:H
H-Blank (on/off?)
Option SW2
Option SW1
Key switch signal input
To operate degauss circuit
Power failure detect input "L" error
Blue output
Green output
Red output
Fast Blanking output
SDA
SCL
Power
Not used
Not used
Not used
Analogue VDD of PLL
Test
Test
Analogue pin for Teletext slicerline PLL
Analogue power supply
Not used
Video input (H.F)
Video input (L.F.)
Not used
Not used
Not used
Analogue pin for the Display Pixel Frequency Multiplier
Horizontal Sync. Input
Vertical Sync. Input
Answer for status
Request for BUS open
Not Used
Sound Mute on/off switch
Not used
Led drive
Not used
Not used
Clock oscillator
-10-
IN/OUT
IN
IN
OUT
OUT
--
--
--
IN
OUT
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN/OUT
OUT
--
--
--
--
--
--
--
--
--
--
--
--
IN
IN
--
--
--
--
--
IN
IN
OUT
IN
--
OUT
OUT
OUT
--
--
IN
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