455A Datasheet, PDF (83/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

455A Group
Port output structure control register FR0
FR03
Ports P12 and P13 output structure selection
bit
FR02
Ports P10 and P11 output structure selection
bit
FR01
Ports P02 and P03 output structure selection
bit
FR00
Ports P00 and P01 output structure selection
bit
at reset : 00002
at power down : 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 FR1
FR13 Ports D3 output structure selection bit
FR12 Ports D2 output structure selection bit
FR11 Ports D1 output structure selection bit
FR10 Ports D0 output structure selection bit
at reset : 00002
at power down : 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 FR2
FR23
Ports P32 and P33 output structure selection
bit
FR22
Ports P30 and P31 output structure selection
bit
FR21 Ports D5 output structure selection bit
FR20 Ports D4 output structure selection bit
at reset : 00002
at power down : 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 FR3
FR33 Ports P23 output structure selection bit
FR32 Ports P22 output structure selection bit
FR31 Ports P21 output structure selection bit
FR30 Ports P20 output structure selection bit
Note 1. “W” represents write enabled.
at reset : 00002
at power down : 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
W
TFR0A
W (Note 1)
TFR1A
W
TFR2A
W
TFR3A
Rev.1.01 Feb 15, 2008 Page 83 of 146
REJ03B0224-0101