M32C8A Datasheet, PDF (312/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
22. Programmable I/O Ports
Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
PCR
Address
03FFh
After Reset
XXXX X000b
Bit Symbol
Bit Name
Function
RW
PCR0
Port P1 control bit⁽¹⁾
0: CMOS output
1: N-channel open drain output⁽²⁾
RW
−
(b2-b1)
Reserved bits
Set to 0
RW
−
(b7-b3)
Unimplemented.
Write 0. Read as undefined value.
−
NOTES:
1. In microprocessor mode, set the PCR0 bit to 0 since port P1 is used as data bus . When using port P1 as an I/O port,
CMOS or N-channel open drain output can be selected.
2. This function is designed to make pseudo open drain by always turning off P channel in the CMOS port . Therefore, the
absolute maximum rating of the input voltage is from -0.3 V to VCC + 0.3 V.
Figure 22.16 PCR Register
Rev.1.00 Jul 15, 2007 Page 295 of 352
REJ09B0385-0100