455A Datasheet, PDF (13/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

455A Group
LCD power supply
LCD control signal
Key-on wakeup
input
(Note 3)
(Note 3) ^L3j
K1j
Edge detection
circuit
(Note 3)
IAP2
instruction
Register A
Aj
LCD power
supply
(Note 3)
FR3j
Aj
D
OP2A _{T Q}
instruction
0 1 ^{L3j (Note 3)}
(Note 1)
P20/SEG24,
P21/SEG25
(Note 2)
(Note 1)
Pull-up
transistor
PU1j
(Note 3)
LCD power supply
LCD control signal
Key-on wakeup
input
(Note 4)
(Note 4) ^L3k
K1k
Edge detection
circuit
IAP2
(Note 4) _instruction
Register A
Ak
LCD power
supply
(Note 4)
FR3k
Ak
D
OP2A _{T Q}
instruction
0 1 ^{L3k (Note 4)}
(Note 1)
P22/SEG26,
P23/SEG27
(Note 1) _{(Note 2)}
Pull-up
transistor
PU1k
(Note 4)
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 7. Port block diagram (5)
Rev.1.01 Feb 15, 2008 Page 13 of 146
REJ03B0224-0101