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Chapter 30 I/O Ports
1.I/O Ports Functions
P00_3
P00_3
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D27
I/O pin for bit 27 of the external data bus. This function is enabled when the
external bus is enabled.
P00_2
P00_2
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D26
I/O pin for bit 26 of the external data bus. This function is enabled when the
external bus is enabled.
P00_1
P00_1
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D25
I/O pin for bit 25 of the external data bus. This function is enabled when the
external bus is enabled.
P00_0
P00_0
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D24
I/O pin for bit 24 of the external data bus. This function is enabled when the
external bus is enabled.
Port 01
P01_7
P01_7
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D23
I/O pin for bit 23 of the external data bus. This function is enabled when the
external bus is enabled.
P01_6
P01_6
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D22
I/O pin for bit 22 of the external data bus. This function is enabled when the
external bus is enabled.
P01_5
P01_5
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D21
I/O pin for bit 21 of the external data bus. This function is enabled when the
external bus is enabled.
P01_4
P01_4
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D20
I/O pin for bit 20 of the external data bus. This function is enabled when the
external bus is enabled.
P01_3
P01_3
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D19
I/O pin for bit 19 of the external data bus. This function is enabled when the
external bus is enabled.
P01_2
P01_2
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D18
I/O pin for bit 18 of the external data bus. This function is enabled when the
external bus is enabled.
P01_1
P01_1
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
D17
I/O pin for bit 17 of the external data bus. This function is enabled when the
external bus is enabled.
Pin Name I/O Signal
Circuit
Type
Function