HD404328 Datasheet, PDF (9/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER

Block Diagram
INT₀
INT₁
Interrupt
control
Timer A
EVENT
Timer B
SI
SO
SCK
AV_SS
AN ₀
AN ₁
AN ₂
AN ₃
AV_CC
BUZZ
Timer C
Serial
interface
A/D
converter
Buzzer
ZCD
Zero-
crossing
detection
V₁
V₂
V₃
COM1
COM2
COM3
COM4
SEG1
SEG2
SE.....G3
SEG23
SEG24
LCD
driver/
controller
HD404328 Series
System control
RAM
(280 × 4 bits)
(536 × 4 bits)
W
(2 bits)
X
(4 bits)
SPX
(4 bits)
Y
(4 bits)
SPY
(4 bits)
CPU
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)
(16,384 × 10 bits)
D₀
D₁
D₂
D₃
D₄
D₅
D₆
D₇
D₈
D₉
D₁₀
R0₀
R0₁
R0₂
R0₃
R1₀
R1₁
R1₂
R1₃
R2₀
R2₁
R2₂
R2₃
R3₀
R3₁
R3₂
R3₃
R4₀
R4₁
R4₂
R4₃
R5₀
R5₁
R5₂
R5₃
Data bus
Large-current pins
Directional
signal line
7