- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45033 > M37517F8HP 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 PDF資料下載
參數(shù)資料
| 型號： | M37517F8HP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 6/98頁 |
| 文件大?。?/td> | 886K |
| 代理商： | M37517F8HP |
第1頁第2頁第3頁第4頁第5頁當前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁
Rev.1.01
Aug 02, 2004
page 14 of 96
7517 Group
TIMERS
The 7517 group has four timers: timer X, timer Y, 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 count down. When the timer reaches “0016”, an un-
derflow occurs at the next count pulse and the corresponding
timer latch is reloaded into the timer and the count is continued.
When a timer underflows, the interrupt request bit corresponding
to that timer is set to “1”.
Timer 1 and Timer 2
The count source of prescaler 12 is the oscillation frequency
which is selected by timer 12 count source selection bit. The out-
put of prescaler 12 is counted by timer 1 and timer 2, and a timer
underflow sets the interrupt request bit.
Timer X and Timer Y
Timer X and Timer Y can each select in one of four operating
modes by setting the timer XY 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 count source selected by Timer count source
selection bit. Whenever the contents of the timer reach “0016”, the
signal output from the CNTR0 (or CNTR1) pin is inverted. If the
CNTR0 (or CNTR1) 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 P27 ( or port P40) direction register to out-
put 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 or
CNTR1 pin.
When the CNTR0 (or CNTR1) active edge selection bit is “0”, the
rising edge of the CNTR0 (or CNTR1) pin is counted.
When the CNTR0 (or CNTR1) active edge selection bit is “1”, the
falling edge of the CNTR0 (or CNTR1) pin is counted.
(4) Pulse Width Measurement Mode
If the CNTR0 (or CNTR1) active edge selection bit is “0”, the timer
counts the selected signals by the count source selection bit while
the CNTR0 (or CNTR1) pin is at “H”. If the CNTR0 (or CNTR1) ac-
tive edge selection bit is “1”, the timer counts it while the CNTR0
(or CNTR1) pin is at “L”.
The count can be stopped by setting “1” to the timer X (or timer Y)
count stop bit in any mode. The corresponding interrupt request
bit is set each time a timer underflows.
Fig. 11 Structure of timer XY mode register
sNote
When switching the count source by the timer 12, X or Y count
source bit, the value of timer count is altered in inconsiderable
amount owing to generating of a thin pulses in the count input
signals.
Therefore, select the timer count source before set the value to
the prescaler and the timer.
Fig. 12 Structure of timer count source selection register
Timer X count stop bit
0: Count start
1: Count stop
Timer XY mode register
(TM : address 002316)
Timer Y operating mode bits
0 0: Timer mode
0 1: Pulse output mode
1 0: Event counter mode
1 1: Pulse width measurement mode
CNTR1 active edge selection bit
0: Interrupt at falling edge
Count at rising edge in event
counter mode
1: Interrupt at rising edge
Count at falling edge in event
counter mode
b7
CNTR0 active edge selection bit
0: Interrupt at falling edge
Count at rising edge in event
counter mode
1: Interrupt at rising edge
Count at falling edge in event
counter mode
b0
Timer X operating mode bits
0 0: Timer mode
0 1: Pulse output mode
1 0: Event counter mode
1 1: Pulse width measurement mode
b1b0
b5b4
Timer Y count stop bit
0: Count start
1: Count stop
Timer count source selection register
(TCSS : address 002816)
b7
b0
Timer X count source selection bit
0 : f(XIN)/16 (f(XCIN)/16 at low-speed mode)
1 : f(XIN)/2 (f(XCIN)/2 at low-speed mode)
Timer Y count source selection bit
0 : f(XIN)/16 (f(XCIN)/16 at low-speed mode)
1 : f(XIN)/2 (f(XCIN)/2 at low-speed mode)
Timer 12 count source selection bit
0 : f(XIN)/16 (f(XCIN)/16 at low-speed mode)
1 : f(XCIN)
Not used (returns “0” when read)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37524E4-XXXSP | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP64 |
| M37531E4V-XXXGP | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP32 |
| M37531M4T-XXXSP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| M37531M4V-XXXGP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32 |
| M37531E8FP | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO36 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37530T-PTC | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Converter for Connecting 42-pin 1.778mm-pitch SDIP to a 40-pin Narrow-pitch Connector (for 7531, 7540, 7542 and 7544 Groups) |
| M37530T-PTCB | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Converter for Connecting 40-pin Narrow-pitch Connector to 32-pin 0.8mm-pitch LQFP (for 7531, 7532, 7534, 7540, 7542 and 7544 Groups) |
| M37530T-PTCC | 功能描述:DEV 42-PIN RSS/MCU TO 32-PIN 1.7 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 標準包裝:1 系列:- 附件類型:適配器板 適用于相關(guān)產(chǎn)品:RCB230，RCB231，RCB212 配用:26790D-ND - RCB BREAKOUT BOARD RS232 CABLE |
| M37531E4FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37531E4FP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MITSUBISHI 8 BIT OTP MCU |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。