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4570 Datasheet(PDF) 28 Page - Renesas Technology Corp

Part # 4570
Description  SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PDF  69 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

4570 Datasheet(HTML) 28 Page - Renesas Technology Corp

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27
MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Fig. 22 Carrier wave output auto-control by timer 1
(C20)
0
Register C20
(C20)
1 (C20)
0 (C20)
1
Interval “a” is set
by timer 1
(C20)
1
Carrier wave output start
Carrier wave output start
“a”
“b”
“c”
“d”
Port CARR output
“H”
“L”
Timer 1 underflow
Timer 1 start
w
“1”
“0”
Timer 1 underflow
“1”
“0”
Port CARR output
“H”
“L”
“1”
“0”
Timer 3 underflow
CARRY
Timer 3 start
w
“H”
“L”
“1”
“0”
f(XIN) (divided by 3)
“H”
“L”
21 0 3 21 0 2 10 3 2 10 2 10
R3H
Timer 3
Timer 3 reload register R3H
“L” interval
TW3A
instruction
Machine cycle
R3L
R3H
R3L
0316
0216
set by
R3L
CARRY
“H”
“L”
CARRY
“H”
“L”
“H” interval
set by R3H
“L” interval
set by
R3L
“H” interval
set by R3H
Timer 3 reload register R3L
Interval “b” is set by
reload register R1
Interval “c” is set by
reload register R1
Interval “d” is set by
reload register R1



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