Interfaces And Test Points; Interfaces - Panasonic EB-GD90 Technical Manual

2

INTERFACES AND TEST POINTS

2.1 Interfaces

2.1.1 Main and Keypad PCBs
The interface between Main and Keypad PCBs is made via a 34-way connector as follows:
No. Signal Name
1 GROUND
2 D28V
3 KEYBKLT
4 LCD_GRN
5 LCD_RED
6 A(1)
7 RnW
8 KBC(4)
9 KBC(3)
10 KBC(2)
11 KBC(0)
12 KBC(1)
13 D(4)
14 D(3)
15 D(2)
16 D(1)
17 D(0)
18 GROUND
19 D28V
20 nPOWKEY
21 PAGING_LED
22 CHARGE_LED
23 nRESET
24 CS_LCD
25 KBR(3)
26 KBR(2)
27 KBR(4)
28 KBR(1)
29 KBR(0)
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Technical Guide
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GND 1
D28V 2
KEYBKLT 3
LCD_GRN 4
LCD_RED 5
A(1) 6
RnV 7
KBC(4) 8
KBC(3) 9
KBC(2) 10
KBC(0) 11
KBC(1) 12
D(4) 13
D(3) 14
D(2) 15
D(1) 16
D(0) 17
Figure 2.1: GD90 Interboard Connector
MAIN <=> KEYPAD Function
-
- Power Source for LCD Module
==> Key Backlight Power Source
==> LCD Green Backlight Power
==> LCD Red Backlight Power
==> MPU Address bus (1)
==> MPU Read/nWrite signal
==> Key Column 4 signal for Key scan
==> Key Column 3 signal for Key scan
==> Key Column 2 signal for Key scan
==> Key Column 0 signal for Key scan
==> Key Column 1signal for Key scan
<==> MPU Data bus (4)
<==> MPU Data bus (3)
<==> MPU Data bus (2)
<==> MPU Data bus (1)
<==> MPU Data bus (0)
- l
- Power Source for LCD Module
<== Power Key sense signal
==> Paging LED control signal
==> Charge LED control signal
==> MPU nRESET signal
==> LCD chip select signal
<== Key Row 3 signal for Key scan
<== Key Row 2 signal for Key scan
<== Key Row 4 signal for Key scan
<== Key Row 1 signal for Key scan
<== Key Row 0 signal for Key scan
Section 2
INTERFACES AND TEST POINTS
18 GND
19 D28V
nPOWKEY
20
PAGING_LED
21
22 CHARGING_LED
23 nRESET
24 CS_LCD
25 KBR(3)
26 KBR(2)
27 KBR(4)
28 KBR(1)
29 KBR(0)
30 D(5)
31 D(6)
32 D(7)
33 REC_P
34
REC_N
– 9 –
10075-1
Connection
Charge IC pin 16
Charge IC pin 18
Charge IC pin 17
GEMINI pin 25
GEMINI pin 20
GEMINI pin 128
GEMINI pin 129
GEMINI pin 130
GEMINI pin 132
GEMINI pin 133
SIM_PWR IC pin 22
GEMINI pin 105
GEMINI pin 55
GEMINI pin 123
GEMINI pin 124
GEMINI pin 122
GEMINI pin 125
GEMINI pin 126
Revision 0
Issue A