HD404318 Datasheet, PDF (7/66 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

Block Diagram
INT₀
INT₁
Interrupt
control
Timer A
EVNB
Timer B
TOC
Timer C
SI
SO
SCK
Serial
interface
AV_SS
AN₀
•
•
•
•
•
•
AN₇
AV_CC
A/D
converter
BUZZ
Data bus
Buzzer
High voltage
pin
Directional
signal line
HD404318 Series
System control
RAM
(384 × 4 bits)
W
(2 bits)
X
(4 bits)
SPX
(4 bits)
Y
(4 bits)
SPY
(4 bits)
ALU
ST
CA
(1 bit) (1 bit)
A
(4 bits)
B
(4 bits)
SP
(10 bits)
Instruction
decoder
PC
(14 bits)
ROM
(4,096 × 10 bits)
(6,144 × 10 bits)
(8,192 × 10 bits)
D₀
D₁
D₂
D₃
D₄
D₅
D₆
D₇
D₈
R0₀
R0₁
R0₂
R0₃
R1₀
R1₁
R1₂
R1₃
R2₀
R2₁
R2₂
R2₃
R3₀
R3₁
R3₂
R3₃
R4₀
R4₁
R4₂
R4₃
R8₀
R8₁
R8₂
R8₃
RA₁
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