参数资料
型号: TSC87C51-L16IEB
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP44
封装: 1.40 MM HEIGHT, VQFP-44
文件页数: 106/176页
文件大小: 2962K
代理商: TSC87C51-L16IEB
35
2535J–AVR–08/10
ATtiny13
8.1
Reset Sources
The ATtiny13 has four sources of reset:
Power-on Reset. The MCU is reset when the supply voltage is below the Power-on Reset
threshold (VPOT).
External Reset. The MCU is reset when a low level is present on the RESET pin for longer
than the minimum pulse length.
Watchdog Reset. The MCU is reset when the Watchdog Timer period expires and the
Watchdog is enabled.
Brown-out Reset. The MCU is reset when the supply voltage VCC is below the Brown-out
Reset threshold (VBOT) and the Brown-out Detector is enabled.
8.1.1
Power-on Reset
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in “System and Reset Characteristics” on page 119. The POR is activated whenever
VCC is below the detection level. The POR circuit can be used to trigger the Start-up Reset, as
well as to detect a failure in supply voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after VCC rise. The RESET signal is activated again, without any delay,
when VCC decreases below the detection level.
Figure 8-2.
MCU Start-up, RESET Tied to VCC
Figure 8-3.
MCU Start-up, RESET Extended Externally
V
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
CC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
VCC
相关PDF资料
PDF描述
TSC87C51-20CBR 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PQCC44
TSC87C51-25CIB 8-BIT, OTPROM, 25 MHz, MICROCONTROLLER, CQCC44
TSC87C51-33CBB 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC44
TSC87C52-33CDB 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44
T89C51RD2-3CVCM 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDIP40
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