HMS38112 Datasheet, PDF (5/73 Pages) List of Unclassifed Manufacturers – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 1.HMS38112
Block Diagram
VDD GND
20 1
EPROM
Ø 64word 16page
Ø8bit
8
4
8
Program counter
10
3-level
Stack
10
4
4
Watchdog
timer
Power-on
Reset
Instruction
Decoder
4
MUX
ALU
4
4
Control Signal
2
X-Reg
RAM
16word x
16
RAM
Word
Selector
Y-Reg
ST
2page x 4bit
4
ACC
OSC
4
R-Latch
4
44
10
D-Latch
10
4
Pulse
Generator
I.R.LED
Drive Tr.
23 4567
OSC1 OSC2
K0 ~ K3
8 9 10 11
R0 ~ R3
12 13 14 15 16 17
D0 D1 D2 D3 D4 D5
Fig 1-1 Block Diagram
18
19
PGND REMOUT
1-2