Pull-Up Control Register 1 (Pur1) - Renesas M16C/64C User Manual

M16C/64C Group
13.3.2

Pull-Up Control Register 1 (PUR1)

Pull-Up Control Register 1
b7 b6 b5 b4 b3 b2 b1
Values after hardware reset, power-on reset, or voltage monitor 0 reset are as follows:
•
00000000b when input to the CNVSS pin is low
•
00000010b when input to the CNVSS pin is high
Values after voltage monitor 1 reset, voltage monitor 2 reset, software reset, watchdog timer reset, or
oscillation stop detection reset are as follows:
•
00000000b when bits PM01 to PM00 are 00b (single-chip mode).
•
00000010b when bits PM01 to PM00 are 01b (memory expansion mode) or 11b (microprocessor
mode).
PU10 (P4_0 to P4_3 pull-up) (b0)
PU11 (P4_4 to P4_7 pull-up) (b1)
PU12 (P5_0 to P5_3 pull-up) (b2)
PU13 (P5_4 to P5_7 pull-up) (b3)
When the PU1i bit (i = 0 to 3) is 1 (pulled high) and the direction bit is 0 (input mode), the corresponding
pin is pulled high.
In memory expansion and microprocessor modes, pins are not pulled high although the bit values can
be modified.
PU14 (P6_0 to P6_3 pull-up) (b4)
PU15 (P6_4 to P6_7 pull-up) (b5)
PU17 (P7_4 to P7_7 pull-up) (b7)
When the PU1i (i = 4, 5, 7) bit is 1 (pulled high) and the direction bit is 0 (input mode), the
corresponding pin is pulled high.
PU16 (P7_2 to P7_3 pull-up) (b6)
When the PU16 bit is 1 (pulled high) and the direction bit is 0 (input mode), the corresponding pin is
pulled high.
Pins P7_0 and P7_1 are not pulled high.
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
b0 Symbol
PUR1
Bit Symbol Bit Name
PU10 P4_0 to P4_3 pull-up
PU11 P4_4 to P4_7 pull-up
PU12 P5_0 to P5_3 pull-up
PU13 P5_4 to P5_7 pull-up
PU14 P6_0 to P6_3 pull-up
PU15 P6_4 to P6_7 pull-up
PU16 P7_2 to P7_3 pull-up
PU17 P7_4 to P7_7 pull-up
Address
0361h
Function
0 : Not pulled high
1 : Pulled high
13. Programmable I/O Ports
Reset Value
0000 0000b
0000 0010b
RW
RW
RW
RW
RW
RW
RW
RW
RW
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