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IC BLOCK DIAGRAM
IC, KS57C0301
P2.0-P2.3
P3.0 /SCK
P3.1 /SO
P3.2 /SI
P3.3 /BUZ
IC, NJM2035
RESET
BASIC
TIMER
INERRUPT
CONTROL
BLOCK
WATCH
TIMER
INTERNAL
INTERRUPTS
I/O PORT 2
INSTRUCTION DECODER
I/O PORT 3
ARITHMETIC
LOGIC UNIT
SERIAL I/O
PORT
256 x 4-BIT
DATA
MEMORY
P0.0/CLO
1
P0.1/TIO
2
P0.2/INT1
3
P1.0/KS0/CIN0
4
P1.1/KS1/CIN1
5
P1.2/KS2/CIN2
6
P1.3/KS3/CIN3
7
8
XOUT
9
XIN
10
VSS
NOTE: Pin assignments are identical for
the 20-pin DIP and SOP package.
2-CH
IN PUT
NC
14
13
2CH AMP
1CH AMP
1
2
1-CH
NC
IN PUT
BYPASS
XIN XOUT
STACK
CLOCK
POINTER
PROGRAM
COUNTER
PROGRAM
STATUS WORD
FLAGS
2-KBYTE
PROGRAM
MEMORY
20
VDD
P3.3/BUZ
19
18
P3.2/SI
17
P3.1/SO
KS57C0301
P3.0/SCK
16
(Top view)
15
P2.3
14
P2.2
13
P2.1
P2.0
12
RESET
11
V +
TRIMMING
12
11
10
BUFFER
TIME
DIVISION
MPX
Q
BUFFER
Q
3
4
5
AC
GND
AC
BYPASS
8
P0.0 /CLO
P0.1 /TIO
P0.2 /INT1
I/O PORT 0
8-BIT
TIMER/
COUNTER
COMPARA-
TOR
I/O PORT 1
P1.0 /KS0 /CIN0
P1.1 /KS1 /CIN1
P1.2 /KS2 /CIN2
P1.3 /KS3 /CIN3
MPX
PILOT
OUT PUT
OUT PUT
9
8
DIVIDER
19K
38K
OSC AMP
6
7
YO
TO
CRYSTAL
CAPACITOR
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