M16C6NK Datasheet, PDF (275/404 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

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M16C/6N Group (M16C/6NK, M16C/6NM)
20. Programmable I/O Ports
Pull-up Control Register 3 (128-pin version)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR3
Address
03DFh
After Reset
00h
Bit Symbol
Bit Name
Function
RW
PU30
P11_0 to P11_3 Pull-Up
0 : Not pulled high
RW
PU31
P11_4 to P11_7 Pull-Up
1 : Pulled high ⁽¹⁾
RW
PU32
P12_0 to P12_3 Pull-Up
RW
PU33
P12_4 to P12_7 Pull-Up
RW
PU34
P13_0 to P13_3 Pull-Up
RW
PU35
P13_4 to P13_7 Pull-Up
RW
PU36
P14_0, P14_1 Pull-Up
RW
0 : Unusable ⁽²⁾
PU37
P11 to P14 Enabling Bit
1 : Usable
RW
NOTES:
1. The pin for which this bit is "1" (pulled high) and the direction bit is "0" (input mode) is pulled high.
2. If the PU37 bit is set to "0" (unusable), the P11 to P14 regisrers are set to "00h".
Figure20.10 PUR3 Register
Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PCR
Address
03FFh
After Reset
00h
Bit Symbol
Bit Name
Function
RW
PCR0 Port P1 Control Bit
Operation performed when the P1
register is read
0 : When the port is set for input, the
input levels of P1_0 to P1_7 pins
are read. When set for output, the RW
port latch is read.
1 : The port latch is read regardless of
whether the port is set for input or
output.
-
Nothing is assigned. When write, set to "0".
(b7-b1) When read, their contents are "0".
-
Figure20.11 PCR Register
Rev.2.00 Nov 28, 2005 page 257 of 378
REJ09B0124-0200