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| 型号： | M34508G4-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20 |
| 封装： | 5.30 X12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20 |
| 文件页数： | 19/32页 |
| 文件大小： | 1049K |
| 代理商： | M34508G4-XXXFP |
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Rev.1.03
2009.07.27
page 26 of 140
REJ03B0148-0103
4508 Group
TIMERS
The 4508 Group has the following timers.
Programmable timer
The programmable timer has a reload register and enables the
frequency dividing ratio to be set. It is decremented from a setting
value n. When it underflows (count to n + 1), a timer interrupt re-
quest flag is set to “1,” new data is loaded from the reload register,
and count continues (auto-reload function).
Fixed dividing frequency timer
The fixed dividing frequency timer has the fixed frequency dividing
ratio (n). An interrupt request flag is set to “1” after every n count of
a count pulse.
Fig. 21 Auto-reload function
Count source
Instruction clock (INSTCK)
PWM2 signal (PWMOD2)
Prescaler output (ORCLK)
CNTR1 input
On-chip oscillator clock (f(RING))
Timer 1 underflow (T1UDF)
Prescaler output (ORCLK)
CNTR0 input
System clock (STCK)
Instruction clock (INSTCK)
Structure
8-bit programmable
binary down counter
8-bit programmable
binary down counter
(link to INT input)
(with PWM output function)
8-bit programmable
binary down counter
(INT input period count
function)
(with PWM output function)
16-bit fixed dividing
frequency
Circuit
Prescaler
Timer 1
Timer 2
Watchdog
timer
Use of output signal
Timer 1 and 2 count sources
Timer 2 count source
CNTR0 output
Timer 1 interrupt
Timer 1 count source
CNTR1 output
Timer 2 interrupt
System reset (counting twice)
Decision of flag WDF1
Frequency
dividing ratio
1 to 256
65536
Control
register
PA
W1
W5
W6
W2
W5
W6
-
The 4508 Group timer consists of the following circuits.
Prescaler : 8-bit programmable timer
Timer 1 : 8-bit programmable timer
Timer 2 : 8-bit programmable timer
(Timers 1 and 2 have the interrupt function, respectively)
16-bit timer
Prescaler and timers 1 and 2 can be controlled with the timer control
registers PA, W1, W2 , W5 and W6. The 16-bit timer is a free counter
which is not controlled with the control register.
Each function is described below.
Table 9 Function related timers
FF16
n
0016
n : Counter initial value
Count starts
Reload
1st underflow
2nd underflow
n+1 count
Time
An interrupt occurs or
a skip instruction is executed.
Timer interrupt
request flag
T
h
e
c
o
n
te
n
ts
o
f
c
o
u
n
te
r
“1”
“0”
相关PDF资料 |
PDF描述 |
|---|---|
| M34508G4FP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20 |
| M34508G4-XXXGP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20 |
| M34509G4FP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24 |
| M34509G4HFP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24 |
| M34509G4-XXXFP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M34508G4-XXXGP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509G4FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509G4HFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509G4H-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34509G4-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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