4554 Datasheet, PDF (14/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
LCD power supply
LCD control
signal
IAP2
instruction
Register A
A0
L30
LCD power supply
LCD power supply
LCD control
signal
IAP2
instruction
Register A
A1
L31
LCD power supply
LCD power supply
LCD control
signal
IAP2
Register A ^instruction
(Note 3) ^AI
L32
LCD power supply
LCD power supply
LCD control
signal
IAP3
instruction
Register A
(Note 4)A^j
L33
LCD power supply
Connecting to •
when P2 is selected.
(Note 1)
SEG31/P20
(Note 2)
Connecting to •
when P2 is selected.
(Note 1)
SEG30/P21
(Note 2)
Connecting to •
when P2 is selected.
(Note 1)
SEG29/P22,
SEG28/P23
(Note 2)
Connecting to •
when P3 is selected.
(Note 1)
SEG27/P30
–SEG24/P33
(Note 2)
Notes 1:
This symbol represents a parasitic diode on the port.
2: Applied potential to these ports must be VDD or less.
3: i represents 0, 1.
4: j represents 0 to 3.
Port block diagram (6)
Rev.3.00 Aug 06, 2004 page 14 of 136
REJ03B0043-0300Z