4509 Datasheet, PDF (11/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 Group
L13
Key-on
0
wakeup
input
1
L12
Level detection circuit
0
Edge detection circuit
1
IAP1 instruction
Register A
A2
FR12
A2
D
W53
OP1A instruction ^{T Q 0}
PWM1 1
W50
Clock (input) for
0
timer 2 event count
1
K12
PU12
(Note 1)
P12/CNTR0(Note 2)
(Note 1)
W20
W21
K13
L13
L12
Key-on
0
Level detection circuit
0
wakeup
input
1
Edge detection circuit
1
IAP1 instruction
Register A
A3
FR13
A3
D
OP1A instruction ^{T Q}
External 0 interrupt
Key-on wakeup input
Timer 1 count start synchronous circuit input
(Notes 3, 4)
External 0 interrupt circuit
PU13
(Note 1)
P13/INT(Note 2)
(Note 1)
Notes 1:
This symbol represents a parasitic diode on the port.
2: Applied potential to these ports must be VDD or less.
3: As for details, refer to the external interrupt structure.
4: The threshold value of port input is different from that of external interrupt input.
Port block diagram (4)
Rev.1.02 2006.12.22 page 11 of 140
REJ03B0147-0102