4554 Datasheet, PDF (7/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
PORT FUNCTION
Port
Pin
Port D D0–D6, D7/CNTR0
Input
Output
I/O
(8)
Output structure
N-channel open-drain/
CMOS
D8/INT0, D9/INT1
Port P0 P00–P03
Output
(2)
I/O
(4)
N-channel open-drain
N-channel open-drain/
CMOS
Port P1 P10–P13
I/O N-channel open-drain/
(4) CMOS
Port P2 SEG31/P20–SEG28/P23
Port P3 SEG27/P30–SEG24/P33
Port C C/CNTR1
Input
(4)
Input
(4)
Output
(1)
CMOS
I/O
Control
Control
unit instructions registers
Remark
1 SD, RD
FR1, FR2 Output structure selection
SZD
W6
function (programmable)
CLD
I1, I2
Key-on wakeup function
K2
(programmable)
4 OP0A
FR0
Built-in programmable pull-up
IAP0
PU0
functions and key-on wakeup
K0
functions (programmable)
4 OP1A
FR0
Built-in programmable pull-up
IAP1
PU1
functions and key-on wakeup
K1
functions (programmable)
4 IAP2
L3
4 IAP3
L3
1 RCP
W4
SCP
Rev.3.00 Aug 06, 2004 page 7 of 136
REJ03B0043-0300Z