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2) Pins
In debug mode, a total of 9 pins (PZ0 to PZ7 in Port Z and PU7 in Port U) are used to
connect the TMP92CZ26A with an emulator via a DSU probe for communicating with the
controller. For this reason, these 9 pins cannot be debugged. Therefore, if the port control
register of each pin is changed in debug mode, the register contents are changed but the
function of each pin remains the same.
bit Symbol
PZ7
PZ
(0068H)
Read/Write
After reset
bit Symbol
PZ7C
PZCR
(006AH)
Read/Write
After reset
Function
bit Symbol
PZ7F
PZFC
(006BH)
Read/Write
After reset
Function
bit Symbol
PZ7D
PZDR
(009AH)
Read/Write
After reset
Function
Note: Although it is possible to write to shaded bits, writing to these bits has no effect (the DSU communication function is
given a higher priority).
Port Z Register
7
6
5
PZ6
PZ5
External pin data (Output latch is reset to "0".)
Port Z Control Register
7
6
5
PZ6C
PZ5C
0
0
0
Port Z Function Register
7
6
5
PZ6F
PZ5F
0
0
0
Port Z Drive Register
7
6
5
PZ6D
PZ5D
1
1
1
Input/output buffer drive register for standby mode
92CZ26A-635
4
3
2
PZ4
PZ3
PZ2
R/W
4
3
2
PZ4C
PZ3C
PZ2C
W
0
0
0
0: Input
1: Output
4
3
2
PZ4F
PZ3F
PZ2F
W
0
0
0
0: Port
4
3
2
PZ4D
PZ3D
PZ2D
R/W
1
1
1
TMP92CZ26A
1
0
PZ1
PZ0
1
0
PZ1C
PZ0C
0
0
1
0
PZ1F
PZ0F
0
0
1
0
PZ1D
PZ0D
1
1
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