4571 Datasheet, PDF (66/126 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4571 Group
Pull-up control register PU0
PU03
Port P03 pull-up transistor
control bit
PU02
Port P02 pull-up transistor
control bit
PU01
Port P01 pull-up transistor
control bit
PU00
Port P00 pull-up transistor
control bit
Pull-up control register PU1
PU13
Port P13 pull-up transistor
control bit
PU12
Port P12 pull-up transistor
control bit
PU11
Port P11 pull-up transistor
control bit
PU10
Port P10 pull-up transistor
control bit
Pull-up control register PU2
PU23 Not used
PU22 Not used
PU21
Port P21 pull-up transistor
control bit
PU20
Port P20 pull-up transistor
control bit
at reset : 00002
at RAM back-up : state retained
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
at reset : 00002
at RAM back-up : state retained
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
at reset : 00002
at RAM back-up : state retained
0
This bit has no function, but read/write is enabled.
1
0
This bit has no function, but read/write is enabled.
1
0 Pull-up transistor OFF
1 Pull-up transistor ON
0 Pull-up transistor OFF
1 Pull-up transistor ON
R/W
TAPU0/TPU0A
R/W
TAPU1/TPU1A
R/W
TAPU2/TPU2A
Port output structure control register FR0
FR03 Not used
FR02 Not used
FR01 Port P31 output structure selection bit
FR00 Port P30 output structure selection bit
at reset : 00002
at RAM back-up : state retained
0
This bit has no function, but read/write is enabled.
1
0
This bit has no function, but read/write is enabled.
1
0 N-channel open-drain output
1 CMOS output
0 N-channel open-drain output
1 CMOS output
Port output structure control register FR1
at reset : 00002
at RAM back-up : state retained
FR13 Port D3 output structure selection bit
0 N-channel open-drain output
1 CMOS output
FR12 Port D2 output structure selection bit
0 N-channel open-drain output
1 CMOS output
FR11 Port D1 output structure selection bit
0 N-channel open-drain output
1 CMOS output
FR10 Port D0 output structure selection bit
0 N-channel open-drain output
1 CMOS output
Note 1. “R” represents read enabled, and “W” represents write enabled.
W
TFR0A
W
TFR1A
Rev.1.02 May 25, 2007 Page 66 of 124
REJ03B0179-0102