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DP-85 CHASSIS SLAVE MICROPROCESSOR I-001 PIN/PORT DESCRIPTION
Pin No.
ID
Port Identification
Function
Active
36
CVIN
Reset
Reset active Low. Reset by I003 during first AC power application and by Q026 when the DM-1 module resets the Slave Microproc-
essor.
Low
37
P31
CLOCK
Clock for the PinP Tuner data communications
Data
38
P30
DATA
Data for the PinP Tuner for Channel change, Programmable Divider, band selection, etc..
Data
39
P03
ENABLE
Enables the reception of data by the PinP Tuner
Data
40
P16
Headphone SEL Det
Active Low detects the insertion of the Headphone Jack
Low
41
P15
LOCK
Notifies the Slave Micro by a Low, when the PinP tuner PLL Phase Detector is locked
Low
42
SDA2
SDA
Data for controlling the 1H Video, 2.14 Video Processor, PinP, LFE/Center Audio Control, Headphone/Rear Audio Control, 3DYC
and Deflection IC's.
Data
43
SDA1
SDA
Data for the PinP/Front audio controller and AV switch IC
Data
44
P67
Auto
Convergence SW
When the Magic Focus switch is pressed, the DM-1 module notifies the Slave Micro.
Then the Slave Micro outputs a high from this pin to the DCU to start Magic Focus.
High
45
SCL2
SCL
Clock for controlling the 1H Video/Chroma, 2.14 Video Processor, PinP, LFE/Center Audio Control, Headphone/Rear Audio Control,
3DYC and Deflection IC's.
Data
46
P66
P.BLK.
(Not Used)
n/a
47
SCL1
SCL
Clock for the PinP/Front audio controller and AV switch IC
Data
48
P65
Data
Data to control the Front L/R and Center Graphic Equalizer
Data
49
P10
KEYIN
Not Used.
n/a
50
P20
KEYIN
Notification of the OEM in which the chassis is used. Diode D002 identifies it as Hitachi by feeding back Key Out2 pulses from pin
38.
Data
53
P20
Power ON/OFF
When the DM-1 Module instructs the Slave Micro. to turn ON, this output goes high
High
54
P62
Clock
Clock for data communications to control the Front L/R and Center Graphic Equalizer
Data
55
P07
Auto Convergence Size
When Magic Focus is initialized or run, the deflection size is widened to guarantee light strikes the Photo cells.
High
56
P61
V.MUTE
Mutes Audio and Video through Q008 and Q010 to Sub Video and Surround PWB during channel change
High
57
P06
Auto
Convergence Busy
Whe the DCU is activated by the Service Only switch, this pin is notified via Q002. After notification,
the Slave Microprocessor notifies the DM-1 module via data to ignore Infrared commands.
High
58
P60
UV/IQ
Not Used.
n/a
59
P05
HOR. Det
Receives a High when the 130V line is drawing excessive current. Shuts off relay.
High
60
P04
Run Supply Det.
(Not Used)
n/a
61
OSC Blk OSD (Blk)
Outputs a pulse slight wider and in time with the OSD characters to clean up video where character will be displayed.
Pulse
62
B
OSD (B)
Outputs Blue characters for the Service Menu
Pulse
63
G
OSD (G)
Outputs Green characters for the Service Menu
Pulse
64
R
OSD (R)
Outputs Red characters for the Service Menu
Pulse
