參數(shù)資料
型號(hào)： M34507M4-XXXFP
元件分類(lèi)： 微控制器/微處理器
英文描述： 4-BIT, MROM, MICROCONTROLLER, PDSO24
封裝： 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24
文件頁(yè)數(shù)： 39/117頁(yè)
文件大?。?/td> 937K
代理商： M34507M4-XXXFP
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Rev.3.01
2005.02.04
page 26 of 111
REJ03B0107-0301
4507 Group
Table 10 Timer control registers
0
1
0
1
0
1
0
1
W21
0
1
Stop (state initialized)
Operating
Instruction clock divided by 4
Instruction clock divided by 16
Stop (state retained)
Operating
Count start synchronous circuit not selected
Count start synchronous circuit selected
Prescaler control bit
Prescaler dividing ratio selection bit
Timer 1 control bit
Timer 1 count start synchronous circuit
control bit
Stop (state retained)
Operating
Count auto-stop circuit not selected
Count auto-stop circuit selected
Count source
Timer 1 underflow signal
Prescaler output (ORCLK)
CNTR input
System clock
Timer 2 control bit
Timer 1 count auto-stop circuit selection
bit (Note 2)
Timer 2 count source selection bits
0
1
0
1
W20
0
1
0
1
W13
W12
W11
W10
W23
W22
W21
W20
Timer control register W1
R/W
at RAM back-up : 00002
at reset : 00002
R/W
at RAM back-up : 00002
at reset : 00002
Timer control register W2
R/W
at RAM back-up : state retained
at reset : 00002
This bit has no function, but read/write is enabled.
Timer 1 underflow signal divided by 2 output
Timer 2 underflow signal divided by 2 output
P12(I/O)/CNTR input (Note 3)
P12 (input)/CNTR input/output (Note 3)
Not used
CNTR output selection bit
P12/CNTR function selection bit
0
1
0
1
0
1
0
1
Timer control register W6
R/W
at RAM back-up : state retained
at reset : 00002
Notes 1: “R” represents read enabled, and “W” represents write enabled.
2: This function is valid only when the timer 1 count start synchronization circuit is selected.
3: CNTR input is valid only when CNTR input is selected as the timer 2 count source.
(1) Timer control registers
Timer control register W1
Register W1 controls the count operation of timer 1, the selection
of count start synchronous circuit, and the frequency dividing ra-
tio and count operation of prescaler. Set the contents of this
register through register A with the TW1A instruction. The TAW1
instruction can be used to transfer the contents of register W1 to
register A.
Timer control register W2
Register W2 controls the selection of timer 1 count auto-stop cir-
cuit, and the count operation and count source of timer 2. Set the
contents of this register through register A with the TW2A instruc-
tion. The TAW2 instruction can be used to transfer the contents
of register W2 to register A.
Timer control register W6
Register W6 controls the P12/CNTR pin function and the selec-
tion of CNTR output. Set the contents of this register through
register A with the TW6A instruction. The TAW6 instruction can
be used to transfer the contents of register W6 to register A..
(2) Prescaler
Prescaler is a frequency divider. Its frequency dividing ratio can be
selected. The count source of prescaler is the instruction clock.
Use the bit 2 of register W1 to select the prescaler dividing ratio
and the bit 3 to start and stop its operation. Prescaler is initialized,
and the output signal (ORCLK) stops when the bit 3 of register W1
is cleared to “0.”
W63
W62
W61
W60
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