External Bus Interface Related Registers; Port Operation Mode Registers - Renesas M32R/ECU Series User Manual

15

15.2 External Bus Interface Related Registers

The following describes the external bus interface related registers.

15.2.1 Port Operation Mode Registers

Ports P0–P4 (except P41–P43) and P224–P227 are switched for external access signal pins during external
extension mode when so set by the corresponding Operation Mode Register. During processor mode, these
ports always function as external access signal pins.
During external extension mode, these pins are switched for port after reset. Therefore, by switching the pin
functions for only those pins that are needed for external access, the remaining pins can be used as port.
Ports P70–P73 can be switched for external access signal pins at any time irrespective of the CPU operation
mode. Ports P41–P43 always function as external access signal pins during external extension and processor
modes.
P0 Operation Mode Register (P0MOD)
b0 1 2
P00MD P01MD P02MD
0 0 0
b Bit Name
0 P00MD
Port P00 operation mode bit
1 P01MD
Port P01 operation mode bit
2 P02MD
Port P02 operation mode bit
3 P03MD
Port P03 operation mode bit
4 P04MD
Port P04 operation mode bit
5 P05MD
Port P05 operation mode bit
6 P06MD
Port P06 operation mode bit
7 P07MD
Port P07 operation mode bit
Note: • Settings of the P0 Operation Mode Register are effective only when the CPU is operating in external extension mode.
3 4 5 6
P03MD P04MD P05MD P06MD
0 0 0 0
EXTERNAL BUS INTERFACE
15.2 External Bus Interface Related Registers
b7
P07MD
0
Function
0: P00
1: DB0
0: P01
1: DB1
0: P02
1: DB2
0: P03
1: DB3
0: P04
1: DB4
0: P05
1: DB5
0: P06
1: DB6
0: P07
1: DB7
15-4
<Address: H'0080 0740>
<After reset: H'00>
R
R
R
R
R
R
R
R
R
32180 Group User's Manual (Rev.1.0)
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