参数资料
型号: MC68HC705C9AVFN
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, PQCC44
封装: PLASTIC, LCC-44
文件页数: 61/177页
文件大小: 1941K
代理商: MC68HC705C9AVFN
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
EPROM Programming
153
Advance Information — MC68HC705C9A
Appendix A. EPROM Programming
A.1 Contents
A.2 Introduction
This section describes programming of the EPROM.
A.3 Bootloader Mode
Bootloader mode is entered upon the rising edge of RESET if the IRQ is
at VTST and the TCAP pin is at logic one. The bootloader code resides
in the ROM from $3F00 to $3FEF. This program handles copying of user
code from an external EPROM into the on-chip EPROM. The bootload
function does not have to be done from an external EPROM, but it may
be done from a host.
The user code must be a one-to-one correspondence with the internal
EPROM addresses.
Table A-1. Operating Modes
RESET
IRQ
TCAP
Mode
VSS to VDD
VTST
VSS to VDD
VDD
User
Bootloader
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