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APPENDIX A – TECHNICAL REFERENCE & TROUBLESHOOTING
Pin
Board
MCU
No.
Label
Mnemonic
1
PTC5
PTC5
2
PTC4
PTC4
3
PTC3
PTC3
4
RST*
RST*
5
PTC1
PTC1
6
PTC0
PTF0
7
OSC1
OSC1
8
PTF2
PTF2
9
Vss
GND
10
PTF4
PTF4
11
Vss
GND
12
PTF7
PTF7
13
VERFH
VERFH
14
Vss
GND
15
PTD6
PTD6
16
PTD0
PTD0
17
PTD4
PTD4
18
VDDADRF
VDDAR
EF
19
PTH0
PTH0
20
PTD2
PTD2
21
PTB1
PTB1
22
PTB0
PTB0
23
PTB3
PTB3
24
PTA6
PTA6
25
PTB5
PTB5
26
PTA5
PTA5
A-14
Table A-2. Target Connector P8
Schematic
Direct to MCU
NET
Sockets?
PTC5
Yes
PTC4
Yes
TGT_PTC3
Yes, after reset
RST*
No, P4 pin 2
TGT_PTC1
Yes, after reset
TGT_PTC0
Yes, after reset
OSC1
Yes
PTF2
Yes
GND
Yes
PTF4
Yes
GND
Yes
PTF7
Yes
VERFH
Yes
GND
Yes
PTD6
Yes
PTD0
Yes
PTD4
Yes
VDDADRF
Yes
PTH0
Yes
PTD2
Yes
PTB1
Yes
PTB0
Yes
PTB3
Yes
PTA6
Yes
PTB5
Yes
PTA5
Yes
Dir
Signal Description
Bidir
Port C I/O – bit 5
Bidir
Port C I/O – bit 4
Bidir
Port C I/O – bit 3
In or
External reset
out
Bidir
Port C I/O – bit 1
Bidir
Port C I/O – bit 0
In
Crystal amplifier input
Bidir
Port F I/O – bit 2
Gnd
ICS/MCU ground
Bidir
Port F I/O – bit 4
Gnd
ICS/MCU ground
Bidir
Port F I/O – bit 7
In
ADC reference
Gnd
ICS/MCU ground
Bidir
Port D I/O – bit 6
Bidir
Port D I/O – bit 0
Bidir
Port D I/O – bit 4
Pwr
ADC power
Bidir
Port H I/O – bit 0
Bidir
Port D I/O – bit 2
Bidir
Port B I/O – bit 1
Bidir
Port B I/O – bit 0
Bidir
Port B I/O – bit 3
Bidir
Port A I/O – bit 6
Bidir
Port B I/O – bit 5
Bidir
Port A I/O – bit 5
M68ICS08ABUM/D
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