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參數(shù)資料
| 型號： | M38K09F8LFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 45/133頁 |
| 文件大?。?/td> | 1359K |
| 代理商： | M38K09F8LFP |
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38K0 Group
Rev.3.00
Oct 05, 2006
page 19 of 129
REJ03B0192-0300
TIMERS
The 38K0 group has three timers: timer X, timer 1, and timer 2.
The division ratio of each timer or prescaler is given by 1/(n + 1),
where n is the value in the corresponding timer or prescaler latch.
All timers are down count timers. When the timer reaches “0016”,
an underflow occurs at the next count pulse and the correspond-
ing timer latch is reloaded into the timer and the count is contin-
ued. When a timer underflows, the interrupt request bit corre-
sponding to that timer is set to “1”.
Fig. 16 Structure of timer X mode register
Timer 1 and Timer 2
The count source of prescaler 12 is the system clock divided by
16. The output of prescaler 12 is counted by timer 1 and timer 2,
and a timer underflow periodically sets the interrupt request bit.
Timer X
Timer X can each select in one of four operating modes by setting
the timer X mode register.
(1) Timer Mode
The timer counts the count source selected by timer count source
selection bit.
(2) Pulse Output Mode
The timer counts the system clock divided by 16. Whenever the
contents of the timer reach “0016”, the signal output from the
CNTR0 pin is inverted. If the CNTR0 active edge selection bit is
“0”, output begins at “ H”.
If it is “1”, output starts at “L”. When using a timer in this mode, set
the corresponding port P51 direction register to output mode.
(3) Event Counter Mode
Operation in event counter mode is the same as in timer mode,
except that the timer counts signals input through the CNTR0 pin.
When the CNTR0 active edge selection bit is “0”, the rising edge of
the CNTR0 pin is counted.
When the CNTR0 active edge selection bit is “1”, the falling edge
of the CNTR0 pin is counted.
(4) Pulse Width Measurement Mode
If the CNTR0 active edge selection bit is “0”, the timer counts the
system clock divided by 16 while the CNTR0 pin is at “H”. If the
CNTR0 active edge selection bit is “1”, the timer counts it while the
CNTR0 pin is at “L”.
The count can be stopped by setting “1” to the timer X count stop
bit in any mode. The corresponding interrupt request bit is set
each time a timer underflows.
Timer X mode register
(TM : address 002316)
Timer X operating mode bits
b1 b0
00 : Timer mode
01 : Pulse output mode
10 : Event counter mode
11 : Pulse width measurement mode
CNTR0 active edge switch bit
0 : Falling edge active for CNTR0 interrupt
Count at rising edge in event counter mode
1 : Rising edge active for CNTR0 interrupt
Count at falling edge in event counter mode
Timer X count stop bit
0 : Count start
1 : Count stop
Not used (return “0” when read)
b7
b0
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相關代理商/技術參數(shù) |
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| M38K09F8LFP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 8-bit 740 CISC 32KB Flash 5V 64-Pin LQFP Tray 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V 32K 64-LQFP LEAD FREE - Trays |
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| M38K09F8LHP#U0 | 功能描述:MCU 3/5V 32K PB-FREE AH570264-LQ RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 產(chǎn)品培訓模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標準包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲器容量:384KB（384K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M38K09RFS | 功能描述:EMULATOR MCU FOR 38K0 GROUP RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 內(nèi)電路編程器、仿真器以及調(diào)試器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 19/Jul/2010 標準包裝:1 系列:* 類型:* 適用于相關產(chǎn)品:* 所含物品:* |
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