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DP-85 CHASSIS SLAVE MICROPROCESSOR I-001 PIN/PORT DESCRIPTION
Pin No.
ID
Port Identification
Function
Active
1
HSYNC OSD H. Pulse
Receives Horizontal Blanking pulses 5VP/P for Service OSD positioning
Pulse
2
VSYNC OSD V.Pulse
Receives Vertical Blanking pulses 5VP/P for Service OSD positioning
Pulse
3
AD4
AFC
Receives the AFC S-Curve signal produced by the PinP tuner indicating the accuracy of the PinP tuning.
Signal
5
TIM2
PIP Sync Det
Detection of PinP Tuner Sync for Auto Programming and AFC
Low
6
P43
AC (50/60 Hz)
Detection of A/C line frequency from Schmitt Amp Q015 and Q016
Pulse
7
AD3
Side Panel APL
Timing Pulse input for OSD creation of Side Panels
Pulse
8
AD2
Dimmer
(Not Used)
n/a
9
P26
V.STOP
Cutoff. This output Stops the Vertical circuit and shuts off the Spot circuit
High
10
P27
CH Change Mute
Mutes Audio through Q022 to Surround PWB during channel change
High
11
PWM4
H.BLK-HP
Outputs a control signal to the RC network attached to IZ06 controlling the phase of the Side Pannel pulses.
High
12
P50
MAIN/PinP
Outputs a control signal to I012 for selection of Main Sync or PinP Sync.
High
13
P01
SCL
Clock for the EEPROM
Data
14
P47
Smooth Wide
Outputs control signal to Q753 and I751 to switch deflection to Smooth Wide
High
15
P02
SDA
Data for the EEPROM
Data
16
P51
4:3
When Fill, Full or Smooth Wide mode is selected in NTSC, output high to prevent generation of Mask Pulse
since no side panels are used.
High
17
SIN
Tx
Data output from Slave Micro to DM-1 module
Data
18
N/A
N/A
No Connection
19
INT1
Request
Request data from/to the DM-1 Module
Data
20
N/A
N/A
No Connection
21
SOUT
Rx
Data input from DM-1 module to Slave Micro
Data
22
N/A
N/A
No Connection
23
SCLK
Clock
Clock for the DM-1 data transmission
Data
24
Avcc
Avcc
+5V
25
HLF
HLF
26
RVCO
TRVCO
Resistive Fixed
27
VHOLD
VHOLD
Fixed by Capacitor
28
CVIN
C. Video Input
Input for Composite Video for Closed Caption detection. However, the DM-1 module actually generates the Closed Caption charac-
ters.
Signal
29
CNVSS
CNVSS
30
OSC In
OSC in
31
OSC Out OSC Out
32
VSS
Ground
Ground
33
Vcc
Vcc
+5V
34
OSC In
OSC In
35
OSC Out OSC Out
