参数资料
型号: AT90S1200A
厂商: Atmel Corp.
元件分类: 8位微控制器
英文描述: -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash
中文描述: 位AVR微控制器具有8K字节的系统内可编程闪存
文件页数: 13/71页
文件大小: 1416K
代理商: AT90S1200A
13
AT90S1200
0838H
AVR
03/02
Figure 13.
Reset Logic
Note:
1. The Power-on Reset will not work unless the supply voltage has been below V
POT
(falling).
Power-on Reset
A Power-on Reset (POR) circuit ensures that the device is reset from power-on. As
shown in Figure 13, an internal timer clocked from the Watchdog timer oscillator pre-
vents the MCU from starting until after a certain period after V
CC
has reached the Power-
on Threshold voltage (V
POT
), regardless of the V
CC
rise time (see Figure 14).
Figure 14.
MCU Start-up, RESET Tied to V
CC
.
If the built-in start-up delay is sufficient, RESET can be connected to V
CC
directly or via
an external pull-up resistor. By holding the RESET pin low for a period after V
CC
has
Table 3.
Reset Characteristics (V
CC
= 5.0V)
Symbol
Parameter
Min
Typ
Max
Units
V
POT
(1)
Power-on Reset Threshold Voltage (rising)
0.8
1.2
1.6
V
Power-on Reset Threshold Voltage (falling)
0.2
0.4
0.6
V
V
RST
Pin Threshold Voltage
0.85 V
CC
V
t
POR
Power-on Reset Period
2.0
3.0
4.0
ms
t
TOUT
Reset Delay Time-out Period (The Time-out
period equals 16K WDT cycles. See
Typical
Characteristics
on page 51. for typical WDT
frequency at different voltages).
11.0
16.0
21.0
ms
V
CC
Power-on Reset
Circuit
RESET
POR
100 - 500K
Reset Circuit
Watchdog
Timer
On-chip
RC Oscillator
C
14-stage Ripple Counter
Time-out
S
Q
R
Q
I
VCC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
相关PDF资料
PDF描述
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相关代理商/技术参数
参数描述
AT90S1200A-12PC 功能描述:8位微控制器 -MCU 1K Flash 5V RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT90S1200A-12PI 制造商:Atmel Corporation 功能描述:MCU 8BIT AT90 RISC 1KB FLASH 3.3V/5V 20PDIP - Rail/Tube
AT90S1200A-12SC 制造商:Atmel Corporation 功能描述:MCU 8BIT AT90 RISC 1KB FLASH 3.3V/5V 20SOIC - Rail/Tube
AT90S1200A-12SI 制造商:Atmel Corporation 功能描述:MCU 8BIT AT90 RISC 1KB FLASH 3.3V/5V 20SOIC - Rail/Tube
AT90S1200A-12YC 功能描述:IC MCU 8BIT 1KB FLASH 20SSOP 制造商:microchip technology 系列:AVR? 90S 包装:管件 零件状态:停產 核心处理器:AVR 核心尺寸:8-位 速度:12MHz 连接性:SPI 外设:POR,WDT I/O 数:15 程序存储容量:1KB(512 x 16) 程序存储器类型:闪存 EEPROM 容量:64 x 8 RAM 容量:- 电压 - 电源(Vcc/Vdd):4 V ~ 6 V 数据转换器:- 振荡器类型:内部 工作温度:0°C ~ 70°C 封装/外壳:20-SSOP(0.209",5.30mm 宽) 供应商器件封装:20-SSOP 基本零件编号:AT90S1200 标准包装:67