- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369230 > 68HC05J5A (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： | 68HC05J5A |
| 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)： | 24/106頁 |
| 文件大小： | 1069K |
| 代理商： | 68HC05J5A |
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頁當(dāng)前第24頁第25頁第26頁第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頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁
GENERAL RELEASE SPECIFICATION
July 16, 1999
MOTOROLA
3-2
CENTRAL PROCESSING UNIT
MC68HC05J5A
REV 2.1
3.2
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.
3.3
INDEX REGISTER (X)
The index register shown in
Figure 3-1
is an 8-bit register that can perform two
functions:
Indexed addressing
Temporary storage
In indexed addressing with no offset, the index register contains the low byte of
the operand address, and the high byte is assumed to be $00. In indexed
addressing with an 8-bit offset, the CPU finds the operand address by adding the
index register content to an 8-bit immediate value. In indexed addressing with a
16-bit offset, the CPU finds the operand address by adding the index register
content to a 16-bit immediate value.
The index register can also serve as an auxiliary accumulator for temporary
storage. The index register is not affected by a reset of the device.
3.4
STACK POINTER (SP)
The stack pointer shown in
Figure 3-1
is a 16-bit register. In MCU devices with
memory space less than 64k-bytes the unimplemented upper address lines are
ignored. The stack pointer contains the address of the next free location on the
stack. During a reset or the reset stack pointer (RSP) instruction, the stack pointer
is set to $00FF. The stack pointer is then decremented as data is pushed onto the
stack and incremented as data is pulled off the stack.
When accessing memory, the ten most significant bits are permanently set to
0000000011. The six least significant register bits are appended to these ten fixed
bits to produce an address within the range of $00FF to $00C0. Subroutines and
interrupts may use up to 64($C0) locations. If 64 locations are exceeded, the
stack pointer wraps around and overwrites the previously stored information. A
subroutine call occupies two locations on the stack and an interrupt uses five
locations.
3.5
PROGRAM COUNTER (PC)
The program counter shown in
Figure 3-1
is a 16-bit register. In MCU devices
with memory space less than 64k-bytes the unimplemented upper address lines
are ignored. The program counter contains the address of the next instruction or
operand to be fetched.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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) |
| 68HC05PL4 | 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 |
|---|---|
| 68HC05JB3 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units (MCUs) |
| 68HC05JB4 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:68HC05JB4 |
| 68HC05K3DW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| 68HC05K3P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| 68HC05L5 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:General Release Specification |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。