4509 Datasheet, PDF (76/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 Group
Port output structure control register FR0
FR03 Port P03 output structure selection bit
FR02 Port P02 output structure selection bit
FR01 Port P01 output structure selection bit
FR00 Port P00 output structure selection bit
Port output structure control register FR1
FR13 Port P13 output structure selection bit
FR12 Port P12 output structure selection bit
FR11 Port P11 output structure selection bit
FR10 Port P10 output structure selection bit
Port output structure control register FR2
FR23 Not used
FR22 Not used
FR21 Port P21 output structure selection bit
FR20 Port P20 output structure selection bit
at reset : 00002
at RAM back-up : state retained
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
at reset : 00002
at RAM back-up : state retained
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
at reset : 00002
at RAM back-up : state retained
0
1
This bit has no function, but read/write is enabled.
0
1
This bit has no function, but read/write is enabled.
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
W
TFR0A
W
TFR1A
W
TFR2A
Port output structure control register FR3
FR33 Port D3 output structure selection bit
FR32 Port D2 output structure selection bit
FR31 Port D1 output structure selection bit
FR30 Port D0 output structure selection bit
at reset : 00002
at RAM back-up : state retained
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
0
N-channel open-drain output
1
CMOS output
Port output structure control register C1
at reset : 00002
at power down : state retained
0
C13 Port D5 output structure selection bit
1
0
C12 Port D4 output structure selection bit
1
0
C11 Port P31 output structure selection bit
1
0
C10 Port P30 output structure selection bit
1
Notes 1: “R” represents read enabled, and “W” represents write enabled.
N-channel open-drain output
CMOS output
N-channel open-drain output
CMOS output
N-channel open-drain output
CMOS output
N-channel open-drain output
CMOS output
W
TFR3A
W
TC1A
Rev.1.02 2006.12.22 page 76 of 140
REJ03B0147-0102