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68HC05CL48 bảng dữ liệu(PDF) 133 Page - Motorola, Inc

tên linh kiện 68HC05CL48
Giải thích chi tiết về linh kiện  SPECIFICATION (General Release)
PDF  145 Pages
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nhà sản xuất  MOTOROLA [Motorola, Inc]
Trang chủ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

68HC05CL48 bảng dữ liệu(HTML) 133 Page - Motorola, Inc

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June 11, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL48
MOTOROLA
REV 2.0
A-1
APPENDIX A
MC68HC705CL48
This appendix describes the differences between the MC68HC705CL48 and
MC68HC05CL48.
This part is for user system evaluation and debugging only, and is not
recommended for mass production.
A.1
INTRODUCTION
The MC68HC705CL48 is an EPROM version of the MC68HC05CL48, and is
available for user system evaluation and debugging only. The MC68HC705CL48
is functionally identical to the MC68HC05CL48 with the exception of the 47.5k-
byte user ROM replaced by 47.5k-byte user EPROM and, the self-check routine is
replaced by a bootstrap routine.
A.2
MEMORY
The MC68HC705CL48 memory map is shown in Figure A-1.
A.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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