- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45035 > M37542F8VFP 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO36 PDF資料下載
參數(shù)資料
| 型號(hào)： | M37542F8VFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO36 |
| 封裝： | 8.4 X 15 MM, 0.80 MM PITCH, PLASTIC, SSOP-36 |
| 文件頁(yè)數(shù)： | 77/139頁(yè) |
| 文件大?。?/td> | 1448K |
| 代理商： | M37542F8VFP |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)當(dāng)前第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)
7542 Group
Rev.3.02
Oct 31, 2006
Page 42 of 134
REJ03B0006-0302
Input capture
7542 group has 2-input capture channels. Each channel (0 and 1)
has the same function and can be used to capture count value of
either Timer A or Timer B.
The source timer for each channel is selected by setting value of
the capture x (x = 0, 1) timer source bit. Timer A and Timer B can
be selected for the source timer to each channel, respectively.
To use each capture channel, set the capture x input port bits and
set the port direction register corresponding to capture channel to
input mode.
The input capture circuit retains the count value of selected timer
when external trigger is input. The timer count value is retained to
the capture latch x0 when rising edge is input and is retained to
the capture latch x1 when falling edge is input.
The count value of timer can be retained by software by capture y
(y = 00, 01, 10, 11) software trigger bit too. When “1” is set to this
bit, count value of timer is retained to the corresponded capture
latch.
When reading from the capture y software trigger bit is executed,
“0” is read out.
The latest status of capture latch can be confirmed by reading of
the capture x status bit. This bit indicates the capture latch which
latest data is in.
The valid trigger edge for capture interrupt is set by the capture x
interrupt edge selection bits. (Regardless of the setting value of
capture x interrupt edge selection bits, timer count values for both
edges are retained to the capture latch.)
Each capture input has the noise filter circuit that judges continu-
ous 4-time same level with sampling clock to be valid. The
sampling clock of noise filter is set by the capture x noise filter
clock selection bits.
Reading from the register for each channel is controlled by setting
value of the capture register read pointer. Reading from each reg-
ister is in the following order;
1.Set the value of the corresponded input capture channel to the
capture register read pointer.
2.Read from the capture register (low-order) and capture register
(high-order).
■ Notes on Input Capture
If the capture trigger is input while the capture register (low-order
and high-order) is in read, captured value is changed between
high-order reading and low-order reading. Accordingly, some
countermeasure by software is recommended, for example
comparing the values that twice of read.
When the on-chip-oscillator is selected for Timer A count source,
Timer A cannot be used for the capture source timer.
Timer B cannot be used for the capture source timer when the
system is in the following state;
CPU operation clock source: XIN oscillation
Timer B count source: Timer A underflow
Timer A count source: On-chip oscillator output
When writing “1” to capture latch x0 (x1) software trigger bit of
capture latch x0 and x1 at the same time, or external trigger and
software trigger occur simultaneously, the set value of capture x
status bit is undefined.
When setting the interrupt active edge selection bit and noise fil-
ter clock selection bit of external interrupt CAP0, CAP1, the
interrupt request bit may be set to “1”.
When not requiring the interrupt occurrence synchronized with
these setting, take the following sequence.
Set the corresponding interrupt enable bit to “0” (disabled).
Set the interrupt edge selection bit or noise filter clock selection bit.
Set the corresponding interrupt request bit to “0” after 1 or more
instructions have been executed.
Set the corresponding interrupt enable bit to “1” (enabled).
When the capture interrupt is used as the interrupt for return
from stop mode, set the capture x noise filter clock selection bits
to “00 (Filter stop)”.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37542M2T-XXXGP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32 |
| M37542M2T-XXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 |
| M37542M2T-XXXGP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32 |
| M37542F8VGP | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP32 |
| M37542M2V-XXXGP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37542M2-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37542M2-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37542M2-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37542M2-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37542M4-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。