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| 型號(hào)： | MC68HC05P18ADWE |
| 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, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁(yè)數(shù)： | 61/130頁(yè) |
| 文件大小： | 1310K |
| 代理商： | MC68HC05P18ADWE |
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NON-DISCLOSURE
AGREEMENT
REQUIRED
Central Processor Unit (CPU)
Technical Data
MC68HC05P18A
Central Processor Unit (CPU)
The 10 most significant bits of the stack pointer are permanently fixed at
000000011, so the stack pointer produces addresses from $00C0 to
$00FF. If subroutines and interrupts use more than 64 stack locations,
the stack pointer wraps around to address $00FF and begins writing
over the previously stored data. A subroutine uses two stack locations.
An interrupt uses five locations.
3.3.4 Program Counter
The program counter (PC) is a 16-bit register that contains the address
of the next instruction or operand to be fetched. The two most significant
bits of the program counter are ignored internally and appear as 00.
Normally, the address in the program counter automatically increments
to the next sequential memory location every time an instruction or
operand is fetched. Jump, branch, and interrupt operations load the
program counter with an address other than that of the next sequential
location.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Bit
0
Read:
Write:
Reset:
0
1
Figure 3-4. Stack Pointer (SP)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Bit
0
Read:
00
5
Write:
Reset:
0
Loaded with vectors from $3FF3 and $3FFF
Figure 3-5. Program Counter (PC)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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| MC68HC05P18ADWR3 | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
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| MC68HC05P18AMDWR2 | 8-BIT, MROM, MICROCONTROLLER, PDSO28 |
| MC68HC05P18ADWR3 | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC05P18AMDWR3 | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05P18AMDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P18AMP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P18AP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P1A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| MC68HC05P1ADW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
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