Philips DVDR3545V/37, Service Manual

Page: 84 / 127

1-17-1 E9H90PIN
IC PIN FUNCTION DESCRIPTIONS
< VCR Section >
IC1501
(SYSTEM CONTROL MICROPROCESSOR)
Pin
No. IN/
OUT
Signal
Name
Function
1 IN
P-DOWN
-H Power Voltage Down Detector
Signal
2
IN
READY/
BUSY
Ready/Busy Communication
Control with Main Micro
Controller
3 IN T-REEL Take Up Reel Rotation Signal
4 - NU Not Used
5
IN REMOTE Remote Signal Input
6 OUT
DISPLAY-
ENA FL Display Driver IC Enable
Control Output Signal
7 OUT
DISPLAY-
DATA FL Display Driver IC Data
Control Output Signal
8 OUT
DISPLAY-
CLK FL Display Driver IC Clock
Control Output Signal
9 - NU Not Used
10 - NU Not Used
11 OUT S-CLK
Communication of Clock with
VCR Micro Controller
12 IN
S-DATA-
IN Communication of Data to
VCR Micro Controller
13 OUT
S-DATA-
OUT Communication of Data from
VCR Micro Controller
14 - TCLK Not Used
15 - TDO Not Used
16 -
TDI Not Used
17
IN/
OUT
IIC-BUS
SDA
IIC BUS Serial Data
18 OUT
IIC-BUS
SCL
IIC BUS Serial Clock
19 OUT YCA-SCL YCA IC Serial Clock
20 OUT YCA-SDA YCA IC Serial Data
21 OUT YCA-CS
YCA IC Chip Select
22 IN
REC-
SAF-SW
Recording Safety SW Detect
(With Record tab = ”L”/ With
out Record tab = ”H”)
23 OUT RF-SW
Video Head Switching Pulse
24 OUT
D-V
SYNC
Dummy V-sync Output
25 IN
RESET Micro Controller Reset Signal
26 OUT
LM-FWD/
REV Loading Motor FWD/ REV
Output
27 OUT P-ON-L
Power On Signal to Low
28 -
NU Not Used
29 OUT D-REC Delayed Record Signal
30 OUT
Hi-Fi-H-
SW Hi-Fi Audio Head Switching
Pulse
31 OUT
VCR-
AUDIO-
MUTE
VCR Audio Mute Control
Signal
32 OUT C-F/R
Capstan Motor FWD/REV
Control Signal (FWD=”L”/
REV=”H”)
33 OUT C-CONT Capstan Motor Control Signal
34 OUT D-CONT
Drum Motor Control Signal
35 - NU Not Used
36 -
VDD Power Supply
37 OUT OSCO
Main Clock Output
14.31818MHz
38 IN
OSCI
Main Clock Input
14.31818MHz
39
- Vss Ground
40 IN XI Main Clock Input
41 OUT XO Main Clock Output
42 IN SXI
Operation Mode Selecting
Input Signal
43 OUT PWR-SW
DVD Power Supply Control
Signal
44
IN
SYS-
RESET System Reset Signal
(Reset=”L”)
45 OUT
REG-
CONT2 Power Regulator Control
Signal
46 OUT
REG-
CONT1 Power Regulator Control
Signal
47 OUT
VIDEO-
OUT Composite Video Signal
Output
48
- Vss VSS (Ground)
49 IN
VIDEO-IN Composite Video Signal Input
50 IN
C-SYNC-
IN Composite Synchronized
Pulse
51 -
VDD2 Power Supply
52 IN
AFCC
Low Path Filter Input Signal
For AFC
53 OUT AFCLPF
Low Path Filter Output Signal
For AFC
54 OUT
VIDEO-
MUTE
Video Mute Control Signal
55 OUT
OUTPUT-
SELECT Output Select (DVD=”L”/
VCR=”H”)
56 - NU Not Used
57 OUT
VIDEO-
SW3
Video Input Select Signal 3
Pin
No. IN/
OUT
Signal
Name
Function