M34282M1 View Datasheet(PDF) - MITSUBISHI ELECTRIC
Part Name
Description
Manufacturer
M34282M1 Datasheet PDF : 70 Pages
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MITSUBISHI MICROCOMPUTERS
4282 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Timer 1 underflow
Timer 1 starts
“1”
(V10)←1
“0”
“H”
Port CARR output “L”
v
v
a
v
b
v
c
d
Set the interval “a” to timer 1. Set the interval “b” Set the interval “c”
Set the interval “d”
Count source CARRY selected to reload register R1. to reload register R1.
to reload register R1.
(V11)←0
Auto-control valid Carrier wave output start
(V12)←1
Timer 1 underflow “1”
“0”
CARRY
“H”
“L”
Port
CARR
output
“H”
“L”
Register V12 “1”
“0”
Carrier wave output start
Auto-control invalid
Timer 1 stop
(V10)←0
(Note)
Auto-control invalid Carrier wave output stop
Note: When timer 1 is stopped, the port CARR output auto-control is terminated regardless of bit 2 (V12) of register V1.
Fig. 14 Port CARR output control by timer 1
q In this case, the following is set;
• Timer 2 carrier wave generation function is valid (V22=“1”),
• “L” interval (0316) of carrier wave is set to reload register R2L
• “H” interval (0216) of carrier wave is set to reload register R2H
To expand “H” interval of carrier wave is invalid (V23=“0”)
[Count source: 4.0 MHz, Resolution: 250 ns]
Timer 2 count source
Timer 2 count value 0316
(Reload register) (R2L)
Timer 2 underflow signal
0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116
(R2H)
(R2L)
(R2H)
(R2L)
(R2H)
CARRYD
Timer 2 starts
3 clocks
interval
Carrier wave period:
7 clocks
3 clocks
interval
Carrier wave period:
7 clocks
To expand “H” interval of carrier wave is valid (V23=“1”)
(When count source is 4.0 MHz, carrier wave is expanded for 125 ns]
Timer 2 count source
Timer 2 count value 0316
(Reload register) (R2L)
Timer 2 underflow signal
0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216
(R2H)
(R2L)
(R2H)
(R2L)
(R2H)
CARRYD
Timer 2 starts
3.5 clocks
interval
Carrier wave period:
7.5 clocks
3.5 clocks
interval
Carrier wave period:
7.5 clocks
Note: When to expand “H” interval of the carrier wave is valid, set “0116” or more to reload register R2H.
Fig. 15 Carrier wave generation example by timer 2
MITSUBISHI
14
ELECTRIC
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