参数资料
型号: MC68HC705JJ7CDW
厂商: Freescale Semiconductor
文件页数: 103/164页
文件大小: 0K
描述: IC MCU 8BIT 20-SOIC
标准包装: 38
系列: HC05
核心处理器: HC05
芯体尺寸: 8-位
速度: 2.1MHz
连通性: SIO
外围设备: POR,温度传感器,WDT
输入/输出数: 14
程序存储器容量: 6KB(6K x 8)
程序存储器类型: OTP
RAM 容量: 224 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
数据转换器: A/D 4x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-SOIC(0.295",7.50mm 宽)
包装: 管件
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
43
Chapter 5
Resets
5.1 Introduction
This section describes the five reset sources and how they initialize the microcontroller unit (MCU). A
reset immediately stops the operation of the instruction being executed, initializes certain control bits, and
loads the program counter with a user-defined reset vector address. These conditions produce a reset:
Initial power-up of device (power-on reset)
A logic 0 applied to the RESET pin (external reset)
Timeout of the computer operating properly (COP) watchdog (COP reset)
Low voltage applied to the device (LVR reset)
Fetch of an opcode from an address not in the memory map (illegal address reset)
Figure 5-1 shows a block diagram of the reset sources and their interaction.
Figure 5-1. Reset Sources
RESET
LATCH
R
COPEN
COP WATCHDOG
POWER-ON RESET
ILLEGAL ADDRESS RESET
INTERNAL
D
INTERNAL
CLOCK
S
RST
TO CPU
AND
LVREN
LOW-VOLTAGE RESET
VDD
3-CYCLE
CLOCKED
1-SHOT
SUBSYSTEMS
ADDRESS BUS
MASK OPTION REGISTER ($1FF1)
INTERNAL DATA BUS
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MC68HC705JP7CP 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
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