M32C80 Datasheet, PDF (295/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
22. Programmable I/O Ports
Pull-Up Control Register 3
b7 b6 b5 b4 b3 b2 b1 b0
000000
Symbol
PUR3
Address
03DB16
Bit
Symbol
Bit Name
PU30 P100 to P103 Pull-up
PU31 P104 to P107 Pull-up
After Reset
0016
Function
RW
Pull-up setting for corresponding port
0: Not pulled up
RW
1: Pulled up
RW
Reserved Bit
Set to "0"
RW
(b7 - b2)
Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
PCR
Address
03FF16
Bit
Symbol
Bit Name
PCR0 Port P1 Control Bit⁽¹⁾
After Reset
XXXX XXX02
Function
RW
0 : CMOS output
1 : N-channel open drain output^{(2) RW}
Reserved Bit
Set to "0"
RW
(b2 - b1)
Nothing is assigned. When write, set to "0".
(b7 - b3) ^{When read, its content is indeterminate.}
NOTES:
1. Set the PCR0 bit to "0" when P1 operates a port for data bus in memory expansion mode and
microprocessor mode. When using P1 as I/O port, CMOS port or N-channel open drain output port
can be selected.
2. This function is designed not to make port P1 a full open drain but to turn off the P channel in the
CMOS port.
Absolute maximum rating of the input voltage is between -0.3V and VCC2 + 0.3V.
Figure 22.14 PUR3 Register and PCR Register
Rev. 1.00 Nov. 01, 2005 ^{Page 276} of 330
REJ09B0271-0100