參數(shù)資料
型號(hào): M34571G4
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機(jī)的CMOS
文件頁數(shù): 27/126頁
文件大?。?/td> 1627K
代理商: M34571G4
Rev.1.02
REJ03B0179-0102
May 25, 2007
Page 27 of 124
4571 Group
The 4571 Group timer consists of the following circuits.
Prescaler : 8-bit programmable timer
Timer 1 : 8-bit programmable timer
Timer 2 : 8-bit programmable timer
Timer 3 : 8-bit programmable timer
Watchdog timer: 16-bit fixed frequency timer
(Timers 1, 2 and 3 have the interrupt function, respectively)
Prescaler, timer 1, timer 2 and timer 3 can be controlled with the
timer control registers PA, W1, W2, W3 and W5. The watchdog
timer is a free counter which is not controlled with the control
register.
Each function is described below.
Table 16 Function related timers
Circuit
Structure
Count source
Frequency
dividing ratio
1 to 256
Use of output signal
Control
register
PA
Prescaler
8-bit programmable
binary down counter
Instruction clock (INSTCK)
Instruction clock divided by 4
(INSTCK/4)
PWM signal (PWMOUT)
Prescaler output (ORCLK)
CNTR0 input (CNTR0IN)
System clock (STCK)
Timer 1 count source
Timer 2 count source
Timer 3 count source
Timer 2 count source
CNTR0 output
Carrier wave output auto-
control
Timer 1 interrupt
CNTR0 output
Timer 2 interrupt
Timer 1
8-bit programmable
binary down counter
(link to INT0 input)
(carrier wave output auto-
control function)
8-bit programmable
binary down counter
1 to 256
W1
W5
Timer 2
PWM signal (PWMOUT)
Timer 1 underflow (T1UDF)
Prescaler output (ORCLK)
System clock (STCK)
X
IN
input
Prescaler output divided by 2
(ORCLK/2)
1 to 256
W2
W5
Timer 3
8-bit programmable
binary down counter
(with carrier wave
generation function)
16-bit fixed dividing
frequency
1 to 256
Timer 1 count source
Timer 2 count source
CNTR1 output
Timer 3 interrupt
System reset (counting twice)
Decision of flag WDF1
W1
W3
W5
Watchdog
timer
Instruction clock (INSTCK)
65536
-
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