- 您现在的位置：买卖IC网 > PDF目录45226 > MC68HC11D3CFB (MOTOROLA INC) 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44 PDF资料下载
参数资料
| 型号： | MC68HC11D3CFB |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 2 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 49/131页 |
| 文件大小： | 1640K |
| 代理商： | MC68HC11D3CFB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页当前第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页
MOTOROLA
CENTRAL PROCESSING UNIT
MC68HC11D3
3-4
TECHNICAL DATA
When a subroutine is called by a jump to subroutine (JSR) or branch to subroutine
(BSR) instruction, the address of the instruction after the JSR or BSR is automatically
pushed onto the stack, least significant byte first. When the subroutine is finished, a
return from subroutine (RTS) instruction is executed. The RTS pulls the previously
stacked return address from the stack, and loads it into the program counter. Execu-
tion then continues at this recovered return address.
When an interrupt is recognized, the current instruction finishes normally, the return
address (the current value in the program counter) is pushed onto the stack, all of the
CPU registers are pushed onto the stack, and execution continues at the address
specified by the vector for the interrupt. At the end of the interrupt service routine, an
RTI instruction is executed. The RTI instruction causes the saved registers to be pulled
off the stack in reverse order. Program execution resumes at the return address.
There are instructions that push and pull the A and B accumulators and the X and Y
index registers. These instructions are often used to preserve program context. For ex-
ample, pushing accumulator A onto the stack when entering a subroutine that uses ac-
cumulator A, and then pulling accumulator A off the stack just before leaving the
subroutine, ensures that the contents of a register will be the same after returning from
the subroutine as it was before starting the subroutine.
3.1.5 Program Counter (PC)
The program counter, a 16-bit register, contains the address of the next instruction to
be executed. After reset, the program counter is initialized from one of six possible
vectors, depending on operating mode and the cause of reset.
3.1.6 Condition Code Register (CCR)
This 8-bit register contains five condition code indicators (C, V, Z, N, and H), two inter-
rupt masking bits, (IRQ and XIRQ) and a stop disable bit (S). In the M68HC11 CPU,
condition codes are automatically updated by most instructions. For example, load ac-
cumulator A (LDAA) and store accumulator A (STAA) instructions automatically set or
clear the N, Z, and V condition code flags. Pushes, pulls, add B to X (ABX), add B to
Y (ABY), and transfer/exchange instructions do not affect the condition codes. Refer
to Table 3-2, which shows what condition codes are affected by a particular instruc-
tion.
3.1.6.1 Carry/Borrow (C)
The C bit is set if the arithmetic logic unit (ALU) performs a carry or borrow during an
arithmetic operation. The C bit also acts as an error flag for multiply and divide opera-
Table 3-1 Reset Vector Comparison
POR or Pin
Clock Monitor
COP Watchdog
Normal
$FFFE, F
$FFFC, D
$FFFA, B
Test or Boot
$BFFE, F
$BFFC, D
$BFFA, B
相关PDF资料 |
PDF描述 |
|---|---|
| MC68L11D0CFBE2 | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC711D3CFN1 | 8-BIT, OTPROM, MICROCONTROLLER, PQCC44 |
| MC68L11D0CFB2 | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68L11D0FN2 | 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44 |
| MC68HC11D0CFN3R2 | 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68HC11D3CFB1 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFB3 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFB4 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFN | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFN1 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
发布紧急采购，3分钟左右您将得到回复。