參數(shù)資料
型號(hào)： M34551E8-XXXFP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, OTPROM, MICROCONTROLLER, PQFP48
封裝： 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù)： 82/154頁
文件大?。?/td> 1778K
代理商： M34551E8-XXXFP
FUNCTIONAL BLOCK OPERATIONS
HARDWARE
1-22
4551 Group User’s Manual
Table 10 Timer control registers
Prescaler control bit
Prescaler dividing ratio selection bit
Timer 1 count source selection bits
Timer control register W1
W13
W12
W11
W10
at reset : 00002
at power down : 00002
0
1
0
1
R/W
Stop (prescaler state initialized)
Operating
Instruction clock (INSTCK) divided by 4
Instruction clock (INSTCK) divided by 8
Count source
Prescaler output (ORCLK)
Carrier output (CARRY)
Carrier output divided by 2 (CARRY/2)
W11
0
1
W10
0
1
0
1
Timer control register W2
at reset : 10002
at power down : – – – 02
R/W
0
1
f(XCIN)
Prescaler output (ORCLK)
W23
W22
W21
W20
Timer 2 count source selection bit
Timer 2 count value selection bits
Timer 1 control bit
W22
0
1
W21
0
1
0
1
Count source
Underflow occur every 214 count
Underflow occur every 213 count
Not available
Stop (timer 1 state retained)
Operating
0
1
Timer control register W3
at reset : 002
at power down : state retained
R/W
0
1
0
1
Bit 3 of timer 2 is output (timer 2 count source divided by 16)
System clock (STCK)
Stop (timer LC state retained)
Operating
W31
W30
Timer LC count source selection bit
Timer LC control bit
Note: “R” represents read enabled, and “W” represents write enabled.
“–” represents state retained.
(1) Timer control registers
q Timer control register W1
Register W1 controls the count source of timer 1, the
frequency dividing ratio 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.
q Timer control register W2
Register W2 controls the count operation of timer 1 and
count operation and count source of timer 2. Set the
contents of this register through register A with the TW2A
instruction. The TAW2 instruction can be used to transfer
the contents of register W2 to register A.
q Timer control register W3
Register W3 controls the count operation and count source
of timer LC. Set the contents of this register through
register A with the TW3A instruction. The TAW3 instruction
can be used to transfer the contents of register W3 to
register A.
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