參數(shù)資料
型號: MC68HC05CT4FN
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.048 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 62/142頁
文件大?。?/td> 624K
代理商: MC68HC05CT4FN
NON-DISCLOSURE
AGREEMENT
REQUIRED
Memory
General Release Specification
MC68HC05CT4 Rev. 2.0
26
Memory
MOTOROLA
Twelve of the user vectors, $1FF4–$1FFF, are dedicated to reset and
interrupt vectors. The four remaining locations — $1FF0, $1FF1, $1FF2,
and $1FF3 — are general-purpose user ROM locations.
2.5 ROM Security Feature
A security feature has been incorporated into the MC68HC05CT4 to
help prevent external viewing of the ROM contents. This feature aids in
maintaining the security of proprietary information in customer-
developed software.1
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
2.6 Random-Access Memory (RAM)
The user RAM consists of 256 bytes of a shared stack area. The RAM
starts at address $0030 and ends at address $012F. 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.
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