4554 Datasheet, PDF (10/138 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4554 Group
Regisger Y
Decoder
SD instruction
RD instruction
CLD
instruction
Regisger Y
Decoder
SD instruction
RD instruction
CLD
instruction
Regisger Y
Decoder
SD instruction
RD instruction
CLD
instruction
Skip decision
(SZD instruction)
FR20
S
RQ
Skip decision
(SZD instruction)
FR21
S
RQ
Skip decision
(SZD instruction)
FR22
S
RQ
(Note 1)
D4 (Note 2)
(Note 1)
D5 (Note 2)
(Note 1)
D6 _{(Note 2)}
Notes 1:
This symbol represents a parasitic diode on the port.
2: Applied potential to these ports must be VDD or less.
Port block diagram (2)
Rev.3.00 Aug 06, 2004 page 10 of 136
REJ03B0043-0300Z