參數(shù)資料
型號: MC68HC05CL48
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.802 MHz, MICROCONTROLLER, PQFP112
封裝: TQFP-112
文件頁數(shù): 48/145頁
文件大?。?/td> 673K
代理商: MC68HC05CL48
June 11, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL48
MOTOROLA
REV 2.0
C-1
APPENDIX C
MC68HC705CL16
This appendix describes the differences between the MC68HC705CL16 and
MC68HC05CL16.
This part is for user system evaluation and debugging only, and is not
recommended for mass production.
C.1
INTRODUCTION
The MC68HC705CL16 is an EPROM version of the MC68HC05CL16, and is
available for user system evaluation and debugging only. The MC68HC705CL16
is functionally identical to the MC68HC05CL16 with the exception of the 16k-byte
user ROM replaced by 16k-byte user EPROM and, the self-check routine is
replaced by a bootstrap routine.
C.2
MEMORY
The MC68HC705CL16 memory map is shown in Figure C-1.
C.3
BOOTLOADER MODE
Bootloader mode is entered upon the rising edge of RESET if the IRQ/VPP pin is
at VTST and the PTB7 pin is at logic one. The Bootloader program and vectors are
masked in the ROM area from $FE00 to $FFEF. This program handles copying of
user code from an external EPROM into the on-chip EPROM. The bootload
function has to be done from an external EPROM. The bootloader performs one
programming pass at 1ms per byte then does a verify pass.
The user code must be a one-to-one correspondence with the internal EPROM
addresses.
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