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Chapter 30 I/O Ports
1.I/O Ports Functions
P07_4
P07_4
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
A4
I/O pin for bit 4 of the external address bus. This function is enabled when the
external bus is enabled.
P07_3
P07_3
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
A3
I/O pin for bit 3 of the external address bus. This function is enabled when the
external bus is enabled.
P07_2
P07_2
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
A2
I/O pin for bit 2 of the external address bus. This function is enabled when the
external bus is enabled.
P07_1
P07_1
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
A1
I/O pin for bit 1 of the external address bus. This function is enabled when the
external bus is enabled.
P07_0
P07_0
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
A0
I/O pin for bit 0 of the external address bus. This function is enabled when the
external bus is enabled.
Port 08
P08_7
P08_7
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
RDY
Input pin for external wait (if RDY enabled for the corresponding CS area).
This function is enabled when the external bus is enabled.
P08_6
P08_6
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
BRQ
Input pin for external bus request (if sharing enabled for the corresponding CS
area). This function is enabled when the external bus is enabled.
P08_5
P08_5
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
BGRNTX
Output pin for external bus granted (if sharing enabled for the corresponding
CS area). This function is enabled when the external bus is enabled.
P08_4
P08_4
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
RDX
Output pin for external bus read strobe. This function is enabled when the
external bus is enabled.
P08_3
P08_3
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
WRX3
Output pin for external bus write strobe. This function is enabled when the
external bus is enabled.
P08_2
P08_2
TP04_0
General purpose I/O. This function is enabled in the single-chip mode or by
setting the corresponding PFR to ‘0’.
WRX2
Output pin for external bus write strobe. This function is enabled when the
external bus is enabled.
Pin Name I/O Signal
Circuit
Type
Function