455A Datasheet, PDF (12/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

455A Group
LCD power supply
LCD control signal
Key-on wakeup
input
(Note 3)
C2j
K02
Edge detection
circuit
IAP1
3
instruction
Register A
Aj
LCD power
supply
FR02
Aj
D
OP1A
instruction
T
Q
0 1 ^{C2j (Note 3)}
(Note 1)
P10/SEG20,
P11/SEG21
(Note 2)
(Note 1)
Pull-up
transistor
PU02
LCD power supply
LCD control signal
Key-on wakeup
input
Note 4
C2k
K03
Edge detection
circuit
Note4
Register A
Ak
IAP1
instruction
LCD power
supply
FR03
Ak
D
OP1A T Q
instruction
0 1 ^{C2k Note 4}
Note 1
P12/SEG22,
P13/SEG23
Note 1 ^{Note 2}
Pull-up
transistor
PU03
Notes 1.
This symbol represents a parasitic diode on the port.
2. Applied potential to these ports must be VDD or less.
3. j represents bits 0, 1.
4. k represents bits 2, 3.
Fig 6. Port block diagram (4)
Rev.1.01 Feb 15, 2008 Page 12 of 146
REJ03B0224-0101