HD404054 Datasheet, PDF (5/101 Pages) Hitachi Semiconductor – HMCS400-series microcomputers designed to increase program productivity with large-capacity memory

Block Diagram
HD404054 Series/HD404094 Series
INT 0
INT 1
External
interrupt
Timer
A
TOC
EVND
TOD
SI 1
SO 1
SCK 1
VCref
COMP 0
COMP 1
Timer
C
Timer
D
Serial
1
Compa-
rator
Note: *Only HD404094 Series
System control
RAM
(512 × 4bit)
W (2bit)
X (4bit)
SPX (4bit)
Y (4bit)
SPY (4bit)
ALU
CPU
ST CA
(1bit) (1bit)
A (4bit)
B (4bit)
SP (10bit)
Instruction
decoder
PC (14bit)
ROM
(4,096 ×10bit)
(2,048 ×10bit)
D0 High
D1 current
D2 source
D3 pins
D4
Intermediate
D5
D6
D7
D8
High
current
sink pins
voltage NMOS
open-drain
output pins*
D9
D12
D13
R00
R10
R11
R12
R13
R2 0
R2 1
R2 2
R2 3
R3 0
R3 1
R3 2
R3 3
R4 0
R4 1
R4 2
R4 3
RD0
RD1
RD2
RD3
RC0
RE0
: Data bus
: Signal line
5