4554 Datasheet, PDF (15/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
LCD power supply
(VLC3/VDD)
LCD power supply
(VLC2)
L11
LCD power supply
(VLC1)
LCD power supply
LCD control
signal
VDD
L23
LCD power
supply
LCD power supply
LCD control
signal
L22
LCD power
supply
LCD control
signal
LCD power
supply
L21
LCD power
supply
Connecting to •
when VLC is selected.
(Note 1)
SEG0/VLC3
(Notes 2 and 3)
Connecting to •
when VLC is selected.
(Note 1)
SEG1/VLC2
(Note 2)
Connecting to •
when VLC is selected.
(Note 1)
SEG2/VLC1
(Note 2)
L13
L20
Reset signal
L12
EPOF+POF2 instruction
(Continuous execution)
Notes 1:
This symbol represents a parasitic diode on the port.
2: Applied potential when VLC is selected must be as follows;
• VDD ≥ VLC3 ≥ VLC2 ≥ VLC1
3: VLC3 = VDD when SEG is selected.
Port block diagram (7)
Rev.3.00 Aug 06, 2004 page 15 of 136
REJ03B0043-0300Z