参数资料
型号: MC68HC705P6ACP
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 25/98页
文件大小: 532K
代理商: MC68HC705P6ACP
MC68HC705P6A Advance Information Data Sheet, Rev. 2.1
Freescale Semiconductor
31
Chapter 4
Resets
4.1 Introduction
The MCU can be reset from three sources: one external input and two internal reset conditions. The
RESET pin is a Schmitt trigger input as shown in Figure 4-1. The CPU and all peripheral modules will be
reset by the RST signal which is the logical OR of internal reset functions and is clocked by PH1.
Figure 4-1. Reset Block Diagram
4.2 External Reset (RESET)
The RESET input is the only external reset and is connected to an internal Schmitt trigger. The external
reset occurs whenever the RESET input is driven below the lower threshold and remains in reset until the
RESET pin rises above the upper threshold. The upper and lower thresholds are given in Chapter 14
4.3 Internal Resets
The two internally generated resets are the initial power-on reset (POR) function and the computer
operating properly (COP) watchdog timer function.
4.3.1 Power-On Reset (POR)
The internal POR is generated at power-up to allow the clock oscillator to stabilize. The POR is strictly for
power turn-on conditions and should not be used to detect a drop in the power supply voltage. There is a
4064 internal clock cycle oscillator stabilization delay after the oscillator becomes active.
D
RST
POWER-ON
RESET
(POR)
RESET
COP
WATCHDOG
(COPR)
VDD
OSC
DATA
ADDRESS
DFF
TO CPU AND
PERIPHERALS
PH1
RES
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相关代理商/技术参数
参数描述
MC68HC705P6ADW 制造商:Rochester Electronics LLC 功能描述:MCU, 176 BYTES RAM, A/D - Bulk
MC68HC705P6AMDW 功能描述:IC MCU 4.6K OTP 2.1MHZ 28-SOIC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN,SCI,SPI 外围设备:POR,PWM,温度传感器,WDT 输入/输出数:21 程序存储器容量:40KB(20K x 16) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC68HC705P6AMP 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705P6CDW 制造商:Motorola Inc 功能描述:
MC68HC705P6CP 制造商:Freescale Semiconductor 功能描述: 制造商:Motorola Inc 功能描述: