參數資料
型號: MC68HC05C8B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP42
封裝: PLASTIC, SHRINK, DIP-42
文件頁數: 78/156頁
文件大?。?/td> 1755K
代理商: MC68HC05C8B
Memory
Advance Information
MC68HC05C8A — Rev. 4.0
28
Memory
MOTOROLA
2.4 ROM Security Feature
A security(1) feature has been incorporated into the MC68HC05C8A to
help prevent externally reading of code in the ROM. This feature aids in
keeping customer developed software proprietary.
2.5 Random-Access Memory (RAM)
The user RAM consists of 176 bytes and is used both for general-
purpose RAM and stack area. The stack begins at address $00FF. The
stack pointer can access 64 bytes of RAM in the range $00FF to $00C0.
NOTE:
Using the stack area for data storage or temporary work locations
requires care to prevent it from being overwritten due to stacking from an
interrupt or subroutine call.
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
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