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參數(shù)資料
| 型號(hào)： | MC68HC05RC18FN |
| 廠商： | MOTOROLA INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 57/124頁(yè) |
| 文件大?。?/td> | 457K |
| 代理商： | MC68HC05RC18FN |
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NON-DISCLOSURE
AGREEMENT
REQUIRED
Central Processing Unit
General Release Specification
MC68HC05RC18 — Rev. 2.0
38
Central Processing Unit
MOTOROLA
3.6 Stack Pointer (SP)
The stack pointer contains the address of the next free location on the
stack. During an MCU reset or the reset stack pointer (RSP) instruction,
the stack pointer is set to location $00FF. The stack pointer is then
decremented as data is pushed onto the stack and incremented as data
is pulled from the stack.
When accessing memory, the eight most significant bits are permanently
set to 00000011. These eight bits are appended to the six least
significant register bits to produce an address within the range of $00FF
to $00C0. Subroutines and interrupts may use up to 64 (decimal)
locations. If 64 locations are exceeded, the stack pointer wraps around
and loses the previously stored information. A subroutine call occupies
two locations on the stack; an interrupt uses five locations.
3.7 Program Counter (PC)
The program counter is a 13-bit register that contains the address of the
next byte to be fetched.
NOTE:
The HC05 CPU core is capable of addressing 16-bit locations. For this
implementation, however, the addressing registers are limited to a 16-
Kbyte memory map.
13
7
0
00000011
SP
13
0
PC
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| MC68HC05RC18DW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
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| MC68HC705SR3CP | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC705SR3CFB | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC705SR3CB | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP42 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05RC8 | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05RC8DW | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05RC8FN | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05RC8P | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05SC24 | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:Secure 8-bit microcomputer with EEPROM |
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