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參數(shù)資料
| 型號： | M34280M1-XXXGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | 0.225 INCH, 0.65 MM PITCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 6/48頁 |
| 文件大?。?/td> | 605K |
| 代理商： | M34280M1-XXXGP |
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11
MITSUBISHI MICROCOMPUTERS
4280 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS
The 4280 Group timer consists of the following circuit.
Timer 1 : 8-bit programmable timer
This timer can be controlled with the timer control register V1.
Timer 1 function is described below.
Table 3 Function related timer
Circuit
Timer 1
Structure
8-bit programmable
binary down counter
Count source
Carrier generating circuit
output (CARRY)
Bit 5 of watchdog timer
Frequency
dividing ratio
1 to 256
Use of output signal
Carrier wave output control
Control
register
V1
Fig. 13 Timers structure
XIN
INSTCK
(Instruction clock)
STCK (System clock)
INSTCK
Q
S
R
13
0
5
WDF1 WDF2
(Note 1)
0
1
V10
CARRY
1
0
V11
(T1AB)
(TAB1)
T1F
D
T
Q
R
V10
SNZT1 instruction
V12
Timer 1 (8)
Reload register R1 (8)
(Note 2)
Register B
Register A
CCK instruction
Initializing signal
(Note 3)
Synchronous
circuit
Carrier wave output control signal
Frequency
divider
(divided by 4)
Frequency
divider
(divided by 8)
WRST instruction
Initializing signal
(Note 3)
Initializing signal (Note 3)
System reset
Notes 1: Counting is stopped by clearing to “0.”
2: When the T1AB instruction is executed after V10 is set to “1,”
writing is performed only to reload register R1.
3: The initializing signal is output at reset or RAM back-up mode.
: Data is automatically set from a reload register
when timer 1 underflows (auto-reload function).
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