4518 Datasheet, PDF (9/160 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4518 Group
PORT BLOCK DIAGRAMS
Register Y
Decoder
Skip decision
SZD instruction
SD instruction
RD instruction
CLD ^{(Note 3) FR1i}
instruction
S
RQ
Register Y
Decoder
Skip decision
SZD instruction
SD instruction
RD instruction
CLD
instruction
FR20
S
RQ
Register Y
Decoder
Skip decision
SZD instruction
SD instruction
RD instruction
CLD
instruction
FR21
S
RQ
(Note 1)
D0—D3 (Note 2)
(Note 1)
(Note 1)
D4 (Note 2)
(Note 1)
(Note 1)
D5 (Note 2)
(Note 1)
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 bits 0 to 3.
Port block diagram (1)
Rev.3.01 2005.06.15 page 9 of 157
REJ03B0008-0301