参数资料
型号: MC68HC705P6AMDWE
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: LEAD FREE, SOIC-28
文件页数: 60/130页
文件大小: 1541K
代理商: MC68HC705P6AMDWE
MC68HC705P6A — Rev. 2.0
Advance Information
MOTOROLA
Operating Modes
35
Advance Information — MC68HC705P6A
Section 3. Operating Modes
3.1 Contents
3.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.3
User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.4
Bootloader Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.5
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.5.1
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
3.5.1.1
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.5.1.2
Halt Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.5.2
WAIT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
3.6
COP Watchdog Timer Considerations . . . . . . . . . . . . . . . . . . .40
3.2 Introduction
The MC68HC705P6A has two modes of operation that affect the pinout
and architecture of the MCU: user mode and bootloader mode. The user
mode is normally used for the application and the bootloader mode is
used for programming the EPROM. The conditions required to enter
each mode are shown in Table 3-1. The mode of operation is
determined by the voltages on the IRQ/VPP and PD7/TCAP pins on the
rising edge of the external RESET pin.
Table 3-1. Operating Mode Conditions After Reset
RESET Pin
IRQ/VPP
PD7/TCAP
Mode
VSS to VDD
Single chip
VPP
VDD
Bootloader
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