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HD404458 Datasheet(PDF) 7 Page - Renesas Technology Corp

Part # HD404458
Description  4-bit HMCS400-series microcomputers
PDF  122 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404458 Datasheet(HTML) 7 Page - Renesas Technology Corp

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HD404459 Series
5
Block Diagram
System control
External
interrupt
Timer
A
Timer
B
Timer
C
Timer
D
Serial
interface
Compa-
rator
RAM
(512
× 4 bits)
(768
× 4 bits)
W
(2 bits)
X
(4 bits)
Y
(4 bits)
SPX
(4 bits)
ST
(1 bit)
CA
(1 bit)
A
(4 bits)
B
(4 bits)
SP
(10 bits)
PC
(14 bits)
Instruction
decoder
CPU
R0
R0
R0
R0
R1
R1
R1
R1
R2
R2
R2
R2
R3
R3
R3
R3
R4
R4
R4
R4
R5
R5
R5
R5
R6
R6
R6
R6
R7
R7
R7
R7
R8
R8
R8
R8
R9
R9
R9
R9
RA
RA
RA
RA
TOC
EVND
TOD
INT
INT
INT
INT
WU
0
to
WU
7
VCref
COMP0
COMP1
COMP2
COMP3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
0
1
2
3
SI
SO
SCK
ROM
(8,192
× 10 bits)
(16,384
× 10 bits)
D
D
D
D
D
D
D
D
D
D
D
D
0
1
2
3
4
5
6
7
8
9
10
11
0
1
2
3
EVNB
TOB
SPY
(4 bits)
ALU



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