INTERFACES AND TEST POINTS
MCUK001001G8
Section 2
Issue 1
Technical Guide
– 3 –
Revision 0
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 33-way connector.
Figure 2.1: Interboard Connector
No.
Signal Name
MAIN <==> KEYPAD
Function
Connection
1
VR
==>
LCD Voltage Reference
2
V[5]
==>
LCD Voltage Reference
3
V[4]
==>
LCD Voltage Reference
4
V[3]
==>
LCD Voltage Reference
5
V[2]
==>
LCD Voltage Reference
6
V[1]
==>
LCD Voltage Reference
7
CAP2+
for LCD Stepup DC/DC
8
CAP2-
for LCD Stepup DC/DC
9
CAP1-
for LCD Stepup DC/DC
10
CAP1+
for LCD Stepup DC/DC
11
CAP3-
for LCD Stepup DC/DC
12
VOUT
13
GND
Ground
GND
14
D28VB
Power Source for LCD module
D28VB
15
DOUT
LCD control Serial data
HERCULES pin 5
16
S_CLK
LCD control Serial clock
HERCULES pin 12
17
LCD_RS
==>
LCD control Address data select
HERCULES pin 59
18
nRESET
==>
MPU nRESET signal
19
CS.LCD
==>
LCD chip select signal
HERCULES pin 14
20
GND
Ground
GND
21
BL[4]
KEY Backlight
ACC IC #49
22
VBAT
Battery Voltage
23
KBR(4)
<==
Key Row 4 signal for Key scan
HERCULES pin 179
24
KBR(3)
<==
Key Row 3 signal for Key scan
HERCULES pin 178
25
KBR(2)
<==
Key Row 2 signal for Key scan
HERCULES pin 176
26
KBR(1)
<==
Key Row 1 signal for Key scan
HERCULES pin 174
27
KBR(0)
<==
Key Row 0 signal for Key scan
HERCULES pin 173
28
KBC(4)
==>
Key Column 4 signal for Key scan
HERCULES pin 172
29
KBC(3)
==>
Key Column 3 signal for Key scan
HERCULES pin 171
30
KBC(2)
==>
Key Column 2 signal for Key scan
HERCULES pin 170
31
KBC(1)
==>
Key Column 1 signal for Key scan
HERCULES pin 169
32
KBC(0)
==>
Key Column 0 signal for Key scan
HERCULES pin 165
33
nPOWKEY
<==
Power Key sense signal
OMEGA pin 74
10224-1
KBR(1)
7
23
GROUND
GROUND
10
26
KBC(2)
1
17
KBC(3)
BL4
2
18
KBC(4)
VBAT
3
19
KBR(0)
KBR(4)
4
20
KBR(3)
5
21
KBR(2)
6
22
CAP2+
VR
V[5]
V[4]
V[3]
V[2]
V[1]
CAP2-
8
24
nPOWKEY
LCD_CS
9
25
CAP3-
CAP1+
11
27
CAP1-
VOUT
12
28
LCD_RS
13
29
D2V8
nRESET
14
30
DOUT
KBC(0)
15
31
S_CLK
KBC(1)
16
32
33
CN801
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