參數(shù)資料
型號(hào)： MC68HC05P9ACP
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝： PLASTIC, DIP-28
文件頁數(shù)： 76/158頁
文件大?。?/td> 3885K
代理商： MC68HC05P9ACP
Memory
24
Memory
RAM
The 128 addresses from $0080–$00FF are RAM locations. The CPU
uses the top 64 RAM addresses, $00C0–$00FF, as the stack. Before
processing an interrupt, the CPU uses five bytes of the stack to save the
contents of the CPU registers. During a subroutine call, the CPU uses
two bytes of the stack to store the return address. The stack pointer
decrements when the CPU stores a byte on the stack and increments
when the CPU retrieves a byte from the stack.
NOTE:
Be careful when using nested subroutines or multiple interrupt levels.
The CPU may overwrite data in the RAM during a subroutine or during
the interrupt stacking operation.
ROM
The following addresses are mask programmable ROM locations:
$0020–$004F
$0100–$08FF
$1FF8–$1FFF (reserved for user-defined interrupt and reset
vectors)
ROM Security Feature
A security1 feature has been incorporated into the MC68HC05P9A to
help prevent externally reading of code in the ROM. This feature aids in
keeping customer developed software proprietary.
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
10-mc68hc05p9a
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05P9ADW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AMDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AMP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AVDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
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