455A Datasheet, PDF (14/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

455A Group
LCD power supply
LCD control signal
Key-on wakeup
input
Note3
C3j
K22
Edge detection
circuit
Note3
IAP3
instruction
Register A
Aj
LCD power
supply
FR22
Aj
D
OP3A
instruction
TQ
0 1 ^{C3j Note3}
Note1
P30/SEG28,
P31/SEG29
Note2
Note1
Note3
PU2j
Pull-up transistor
LCD power supply
LCD control signal
Key-on wakeup
input
Note4
C3k
K23
Edge detection
circuit
Note4
Register A
Ak
IAP3
instruction
LCD power
supply
FR23
Ak
D
OP3A T Q
instruction
0 1 ^{C3k Note4}
Note1
P32/SEG30,
P33/SEG31
Note1 _Note2
Note4
PU2k
Pull-up transistor
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 8. Port block diagram (6)
Rev.1.01 Feb 15, 2008 Page 14 of 146
REJ03B0224-0101