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參數(shù)資料
| 型號(hào)： | MC68HC05BD7B |
| 廠(chǎng)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, PDIP42 |
| 封裝： | SDIP-42 |
| 文件頁(yè)數(shù)： | 20/85頁(yè) |
| 文件大?。?/td> | 302K |
| 代理商： | MC68HC05BD7B |
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SECTION 3: CPU CORE
MOTOROLA
Page 17
MC68HC05BD7 Rev. 2.0
GENERAL RELEASE SPECIFICATION
PRELIMINARY
SECTION 3
CPU CORE
The MC68HC05BD7 has a 16K memory map. Therefore it uses only the lower 14 bits of
the address bus. In the following discussion the upper 2 bits of the address bus can be
ignored. The stack has only 64 bytes. Therefore, the stack pointer has been reduced to only
6 bits and will only decrement down to $00C0 and then wrap-around to $00FF. All other
instructions and registers behave as described in this chapter.
3.1
Registers
The MCU contains five registers which are hard-wired within the CPU and are not part of
the memory map. These five registers are shown in Figure 3-1 and are described in the
following paragraphs.
Figure 3-1: MC68HC05 Programming Model
3.1.1
Accumulator (A)
The accumulator is a general purpose 8-bit register as shown in Figure 3-1. The CPU uses
the accumulator to hold operands and results of arithmetic calculations or non-arithmetic
operations. The accumulator is not affected by a reset of the device.
CONDITION CODE REGISTER
I
ACCUMULATOR
60
A
INDEX REGISTER
71
X
4
52
3
STACK POINTER
SP
14
8
15
9
12
13
10
11
PC
CC
111
11
0
PROGRAM COUNTER
H
NZC
HALF-CARRY BIT (FROM BIT 3)
INTERRUPT MASK
NEGATIVE BIT
ZERO BIT
CARRY BIT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC05BD7P | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC705BD7B | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP42 |
| MC68HC05C0B | 8-BIT, 4 MHz, MICROCONTROLLER, PDIP42 |
| MC68HC05C0P | 8-BIT, 4 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC05C0FN | 8-BIT, 4 MHz, MICROCONTROLLER, PQCC44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05C0CP | 制造商:Motorola Inc 功能描述: |
| MC68HC05C12 | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
| MC68HC05C12B | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
| MC68HC05C12CP | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
| MC68HC05C12P | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
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