参数资料
型号: M34551M4-XXXFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48
封装: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件页数: 15/71页
文件大小: 966K
代理商: M34551M4-XXXFP
19
MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
Fig. 19 Timers structure
Frequency
dividing circuit
(divided by 3)
XIN
XCIN
Timer 1
interrupt
T1F
INSTCK
ORCLK
Carrier wave
output control
Frequency
dividing circuit
(divided by 4)
Reload register R1 (8)
Timer 1 (8)
Register B
Register A
(T1AB)
(TAB1)
(Note 1)
0
1
W20
MR0
0
1
W11,W10
00,01
10
11
1/4
1/8
W13
0
1
0
1
W12
Prescaler
ORCLK
MR3
0
1
(Note 2)
1
2
STCK
CARRY
Count source is stopped by setting to “0.”
When the T1AB instruction is executed after
setting W20 to “1,” data is written only to
reload register R1.
When the contents of W23 changes from “0”
to “1,” the count value of timer 2 is initialized.
Timer 2
1
2
Timer LC (4)
Reload register LC (4)
LCD clock
Count
source
ORCLK
Timer 2
interrupt
T2F
Count
source
W23
0
1
W22, W21
00
01
Not available
Q
R
S
WEF
Reset signal
WRST instruction
System
reset
To port CARR
10,11
(Note 1)
0
1
W30
1
0
W31
1
03
25
47
69
812 13
10 11
STCK
Q
D
T
WDF
(Note 3)
Notes 1:
2:
3:
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