Renesas M16C/50 Series User Manual page 198

M16C/5L Group, M16C/56 Group
11.3.12 Port Pi Direction Register (PDi) (i = 0 to 3, 6 to 10)
Port Pi Direction Register (i=0 to 3, 6 to 8, 10)
b7 b6 b5 b4 b3 b2 b1 b0
Port P9 Direction Register
b7 b6 b5 b4 b3 b2 b1
Write to the PD9 register in the next instruction after setting the PRC2 bit in the PRCR register to 1
(write enabled).
These registers select whether I/O ports are to be used for input or output. Each bit in the PDi register
corresponds to one port.
To use I/O pins shared with the following peripheral functions, set the corresponding port direction bit to
0 (input mode):
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
Symbol
PD0 to PD3
PD6 to PD7
PD8
PD10
Bit Symbol Bit Name
PDi_0 Port Pi_0 direction bit
PDi_1 Port Pi_1 direction bit
PDi_2 Port Pi_2 direction bit
PDi_3 Port Pi_3 direction bit
PDi_4 Port Pi_4 direction bit
PDi_5 Port Pi_5 direction bit
PDi_6 Port Pi_6 direction bit
PDi_7 Port Pi_7 direction bit
b0
Symbol
PD9
Bit Symbol Bit Name
PD9_0 Port P9_0 direction bit
PD9_1 Port P9_1 direction bit
PD9_2 Port P9_2 direction bit
PD9_3 Port P9_3 direction bit
—
No register bit. If necessary, set to 0. The read value is undefined.
(b4)
PD9_5 Port P9_5 direction bit
PD9_6 Port P9_6 direction bit
PD9_7 Port P9_7 direction bit
Address
03E2h, 03E3h, 03E6h, 03E7h
03EEh, 03EFh
03F2h
03F6h
0 : Input mode
(functions as an input port)
1 : Output mode
(functions as an output port)
Address
03F3h
0 : Input mode
(functions as an input port)
1 : Output mode
(functions as an output port)
0 : Input mode
(functions as an input port)
1 : Output mode
(functions as an output port)
11. Programmable I/O Ports
After Reset
00h
00h
00h
00h
Function RW
RW
RW
RW
RW
RW
RW
RW
RW
Reset Value
000X 0000b
Function
Page 161 of 803
RW
RW
RW
RW
RW
—
RW
RW
RW