- 您现在的位置：买卖IC网 > PDF目录69380 > ST7PLUSA2M3 (STMICROELECTRONICS) 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8 PDF资料下载
参数资料
| 型号： | ST7PLUSA2M3 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件页数： | 100/136页 |
| 文件大小： | 1705K |
| 代理商： | ST7PLUSA2M3 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页当前第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
On-chip peripherals
ST7LITEUS2, ST7LITEUS5
Figure 30.
Lite timer block diagram
10.1.3
Functional description
The value of the 13-bit counter cannot be read or written by software. After an MCU reset, it
starts incrementing from 0 at a frequency of fOSC. A counter overflow event occurs when the
counter rolls over from 1F39h to 00h. If fOSC = 8 MHz, then the time period between two
counter overflow events is 1 ms. This period can be doubled by setting the TB bit in the
LTCSR register.
When the timer overflows, the TBF bit is set by hardware and an interrupt request is
generated if the TBIE is set. The TBF bit is cleared by software reading the LTCSR register.
Watchdog
The watchdog is enabled using the WDGE bit. The normal watchdog timeout is 2 ms (@
fosc = 8 MHz), after which it then generates a reset.
To prevent this watchdog reset occurring, software must set the WDGD bit. The WDGD bit is
cleared by hardware after tWDG. This means that software must write to the WDGD bit at
regular intervals to prevent a watchdog reset occurring. Refer to Figure 31.
If the watchdog is not enabled immediately after reset, the first watchdog timeout will be
shorter than 2ms, because this period is counted starting from reset. Moreover, if a 2ms
period has already elapsed after the last MCU reset, the watchdog reset will take place as
soon as the WDGE bit is set. For these reasons, it is recommended to enable the watchdog
immediately after reset or else to set the WDGD bit before the WGDE bit so a watchdog
reset will not occur for at least 2 ms.
Note:
Software can use the timebase feature to set the WDGD bit at 1 or 2 ms intervals.
LTCSR
WATCHDOG
13-bit UPCOUNTER
/2
8-bit
fLTIMER
fWDG
8 MSB
LTIC
fOSC
WDGD
WDGE
WDG
TBF
TBIE
TB
ICF
ICIE
WATCHDOG RESET
LTTB INTERRUPT REQUEST
LTIC INTERRUPT REQUEST
LTICR
INPUT CAPTURE
REGISTER
1
0
1 or 2 ms
Timebase
(@ 8MHz
fOSC)
To 12-bit AT TImer
fLTIMER
RF
0
7
相关PDF资料 |
PDF描述 |
|---|---|
| ST7PMC1K2TC/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32 |
| ST7FMC2S4TC | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST7FMC2S6TC | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST7PMC2S4TC/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST7PMC2S5TC/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST7PMC1K2B3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI? |
| ST7PMC1K2B6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI |
| ST7PMC1K2T3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI? |
| ST7PMC1K2T6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI |
| ST7PMC1K2T6/ST7PMC1K2 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI |
发布紧急采购，3分钟左右您将得到回复。