- 您现在的位置：买卖IC网 > PDF目录98144 > ST62E85BG1 (STMICROELECTRONICS) 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CQFP80 PDF资料下载
参数资料
| 型号： | ST62E85BG1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CQFP80 |
| 封装： | CERAMIC, QFP-80 |
| 文件页数： | 14/78页 |
| 文件大小： | 868K |
| 代理商： | ST62E85BG1 |
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页当前第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
Obsolete
Product(s)
- Obsolete
Product(s)
21/78
ST62T85B/E85B
RESETS (Cont’d)
3.2.3 Watchdog Reset
The MCU provides a Watchdog timer function in
order to ensure graceful recovery from software
upsets. If the Watchdog register is not refreshed
before an end-of-count condition is reached, the
internal reset will be activated. This, amongst oth-
er things, resets the watchdog counter.
The MCU restarts just as though the Reset had
been generated by the RESET pin, including the
built-in stabilisation delay period.
3.2.4 Application Notes
No external resistor is required between VDD and
the Reset pin, thanks to the built-in pull-up device.
The POR circuit operates dynamically, in that it
triggers MCU initialization on detecting the rising
edge of VDD. The typical threshold is in the region
of 2 volts, but the actual value of the detected
threshold depends on the way in which VDD rises.
The POR circuit is
NOT designed to supervise
static, or slowly rising or falling VDD.
3.2.5 MCU Initialization Sequence
When a reset occurs the stack is reset, the PC is
loaded with the address of the Reset Vector (locat-
ed in program ROM starting at address 0FFEh). A
jump to the beginning of the user program must be
coded at this address. Following a Reset, the In-
terrupt flag is automatically set, so that the CPU is
in Non Maskable Interrupt mode; this prevents the
initialisation routine from being interrupted. The in-
itialisation routine should therefore be terminated
by a RETI instruction, in order to revert to normal
mode and enable interrupts. If no pending interrupt
is present at the end of the initialisation routine, the
MCU will continue by processing the instruction
immediately following the RETI instruction. If, how-
ever, a pending interrupt is present, it will be serv-
iced.
Figure 11. Reset and Interrupt Processing
Figure 12. Reset Block Diagram
RESET
VECTOR
JP
JP:2 BYTES/4 CYCLES
RETI
RETI: 1 BYTE/2 CYCLES
INITIALIZATION
ROUTINE
VA00181
VDD
RESET
300k
2.8k
POWER
WATCHDOG RESET
CK
COUNTER
RESET
ST6
INTERNAL
RESET
fOSC
RESET
ON RESET
VA0200B
21
相关PDF资料 |
PDF描述 |
|---|---|
| ST62P35BQ3/XXX | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP52 |
| ST62P35BQ6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP52 |
| ST62P35BQ1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP52 |
| ST6235BQ1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP52 |
| ST62P45BQ6/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP52 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST62E85G1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| ST62E8X-EPB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EPROM PROGRAMMING BOARDS DATASHEET FOR ST62 FAMILY |
| ST62E8X-EPB/110 | 功能描述:程序设计器 - 基于处理器 ST62 EPROM Programmr RoHS:否 制造商:Olimex Ltd. 产品:Programmers 工具用于评估:XMEGA, MegaAVR, tinyAVR 核心:AVR 接口类型:USB 工作电源电压:1.8 V to 5.5 V |
| ST62E94F1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| ST62EBF1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
发布紧急采购，3分钟左右您将得到回复。