參數(shù)資料
型號： ST72C314N4
元件分類： 圖像傳感器
英文描述： CMOS Image Sensor
中文描述： CMOS圖像傳感器
文件頁數(shù)： 76/153頁
文件大?。?/td> 1988K
代理商： ST72C314N4
ST72334J/N, ST72314J/N, ST72124J
29/153
RESET SEQUENCE MANAGER (Cont’d)
9.2.2 Asynchronous External RESET pin
The RESET pin is both an input and an open-drain
output with integrated RON weak pull-up resistor.
This pull-up has no fixed value but varies in ac-
cordance with the input voltage. It can be pulled
low by external circuitry to reset the device. See
electrical characteristics section for more details.
A RESET signal originating from an external
source must have a duration of at least th(RSTL)in in
order to be recognized. This detection is asynchro-
nous and therefore the MCU can enter reset state
even in HALT mode.
The RESET pin is an asynchronous signal which
plays a major role in EMS performance. In a noisy
environment, it is recommended to follow the
guidelines mentioned in the electrical characteris-
tics section.
Two RESET sequences can be associated with
this RESET source: short or long external reset
pulse (see Figure 16).
Starting from the external RESET pulse recogni-
tion, the device RESET pin acts as an output that
is pulled low during at least tw(RSTL)out.
9.2.3 Internal Low Voltage Detection RESET
Two different RESET sequences caused by the in-
ternal LVD circuitry can be distinguished:
s
Power-On RESET
s
Voltage Drop RESET
The device RESET pin acts as an output that is
pulled low when VDD<VIT+ (rising edge) or
VDD<VIT- (falling edge) as shown in Figure 16.
The LVD filters spikes on VDD larger than tg(VDD) to
avoid parasitic resets.
9.2.4 Internal Watchdog RESET
The RESET sequence generated by a internal
Watchdog counter overflow is shown in Figure 16.
Starting from the Watchdog counter underflow, the
device RESET pin acts as an output that is pulled
low during at least tw(RSTL)out.
Figure 16. RESET Sequences
VDD
0000000000
000
RUN
RESET PIN
EXTERNAL
WATCHDOG
DELAY
VIT+
VIT-
th(RSTL)in
tw(RSTL)out
RUN
00000000000
000
DELAY
th(RSTL)in
00000000000
000
DELAY
WATCHDOG UNDERFLOW
tw(RSTL)out
RUN
0000000000
0000
DELAY
RUN
RESET
SOURCE
SHORT EXT.
RESET
LVD
RESET
LONG EXT.
RESET
WATCHDOG
RESET
0000000000000
0000000000000 INTERNAL RESET (4096 TCPU)
FETCH VECTOR
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72C314N4B6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72C314N4T6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72C334J2B6 功能描述:8位微控制器 -MCU Flash 8K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72C334J2T6 功能描述:8位微控制器 -MCU Flash 8K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST72C334J4B6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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