Ic Pin Function Descriptions - Magnavox ZV420MW8 Service Manual

IC PIN FUNCTION DESCRIPTIONS

< VCR Section >
IC1501
(SYSTEM CONTROL MICROPROCESSOR)
Pin IN/ Signal
No. OUT Name
P-DOWN Power Voltage Down Detector
1 IN
-H Signal
Ready/Busy Communication
READY/
2 Control with Main Micro
IN
BUSY
Controller
3 IN T-REEL Take Up Reel Rotation Signal
4 - NU Not Used
IN REMOTE Remote Control Sensor
5
DISPLAY- FL Display Driver IC Enable
6 OUT
ENA Control Output Signal
DISPLAY- FL Display Driver IC Data
7 OUT
DATA Control Output Signal
DISPLAY- FL Display Driver IC Clock
8 OUT
CLK Control Output Signal
9 NU Not Used
-
10 - NU Not Used
Communication of Clock with
11 OUT S-CLK
VCR Micro Controller
S-DATA- Communication of Data to
12 IN
IN VCR Micro Controller
S-DATA- Communication of Data from
13 OUT
OUT VCR Micro Controller
14 TCLK Not Used
-
15 TDO Not Used
-
TDI Not Used
16 -
IN/ IIC-BUS-
IIC BUS Serial Data
17
OUT SDA
IIC-BUS-
18 OUT IIC BUS Serial Clock
SCL
19 OUT YCA-SCL YCA IC Serial Clock
20 OUT YCA-SDA YCA IC Serial Data
21 OUT YCA-CS YCA IC Chip Select
Recording Safety SW Detect
REC-
(With Record tab = "L"/
22 IN
SAF-SW
Without Record tab = "H")
23 OUT RF-SW Video Head Switching Pulse
D-V
Dummy V-sync Output
24 OUT
SYNC
System Reset Signal
IN RESET
25
(Reset="L")
Function
1-16-1
Pin IN/ Signal
No. OUT Name
LM-FWD/ Loading Motor FWD/ REV
26 OUT
REV Output
27 OUT P-ON-L Power On Signal to Low
28 - NU Not Used
29 OUT D-REC Delayed Record Signal
Hi-Fi-H- Hi-Fi Audio Head Switching
30 OUT
SW Pulse
VCR-
VCR Audio Mute Control
31 OUT AUDIO-
Signal
MUTE
Capstan Motor FWD/REV
32 OUT C-F/R 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
-
VDD Power Supply
36 -
Main Clock Output
37 OUT OSCO
14.31818MHz
Main Clock Input
IN OSCI
38
14.31818MHz
39 - VSS Ground
40 IN XI Main Clock Input
41 OUT XO Main Clock Output
Operation Mode Selecting
IN SXI
42
Input Signal
DVD Power Supply Control
43 OUT PWR-SW
Signal
SYS- System Reset Signal
IN
44
RESET (Reset="L")
REG- Power Regulator Control
45 OUT
CONT2 Signal
REG- Power Regulator Control
46 OUT
CONT1 Signal
VIDEO- Composite Video Signal
47 OUT
OUT Output
- Vss Ground
48
IN VIDEO-IN Composite Video Signal Input
49
C-SYNC- Composite Synchronized
50 IN
IN Pulse
VDD2 Power Supply
51 -
Low Pass Filter Input Signal
IN AFCC
52
For AFC
Function
E9E8APIN