- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369230 > 68HC705BD7 (Motorola, Inc.) 8-Bit Microcontroller Units (MCU).(8位微控制器) PDF資料下載
參數(shù)資料
| 型號(hào)： | 68HC705BD7 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數(shù)： | 27/85頁 |
| 文件大?。?/td> | 302K |
| 代理商： | 68HC705BD7 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁
SECTION 3: CPU CORE
MOTOROLA
Page 17
MC68HC05BD7 Rev. 2.0
GENERAL RELEASE SPECIFICATION
PRELMNARY
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
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
6
0
A
INDEX REGISTER
7
1
X
4
5
2
3
STACK POINTER
SP
14
8
15
9
12
13
10
11
PC
CC
1
1
1
1
1
0
0
0
0
0
0
0
0
PROGRAM COUNTER
H
Z
C
HALF-CARRY BIT (FROM BIT 3)
INTERRUPT MASK
NEGATIVE BIT
ZERO BIT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 68HC05J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HC705J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HRC05J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HRC705J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HC05K0 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 68HC705C5 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION(General Release) |
| 68HC705C8 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PROGRAMMING REFRERENCE GUIDE |
| 68HC705C8ACP | 制造商: 功能描述: 制造商:Motorola Inc 功能描述: 制造商:undefined 功能描述: |
| 68HC705CJ4FB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| 68HC705CJ4P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。