4501_M Datasheet, PDF (21/212 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4501 Group
HARDWARE
PIN DESCRIPTION
PORT BLOCK DIAGRAMS
Register Y
Skip decision
Decoder (SZD instruction)
SD instruction
RD instruction
CLD
instruction
S
RQ
D0, D1
(Note 1)
Register Y
SD instruction
RD instruction
Decoder
Key-on wakeup
CLD
instruction
SCP instruction
K22
“L” level
detection circuit
Skip decision
(SZD instruction)
Skip decision
S
(SNZCP
instruction)
RQ
S
RCP instruction R Q
Pull-up
transistor
PU22
(Note 1)
D2/C (Note 2)
Register Y
SD instruction
RD instruction
Decoder
Key-on wakeup
Pull-up
transistor
K23
“L” level
detection circuit
PU23
CLD
instruction
Skip decision
(SZD instruction)
IAK instruction
S
Register A
RQ
A0 D
(Note 1)
D3/K (Note 2)
OKA instruction
TQ
Notes 1:
This symbol represents a parasitic diode on the port.
2: Applied potential to ports D2/C and D3/K must be VDD or less.
Port block diagram (1)
Rev.2.01 Feb 07, 2005
REJ09B0192-0201
1-9