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PIC16F627-04I/SO 参数 Datasheet PDF下载

PIC16F627-04I/SO图片预览
型号: PIC16F627-04I/SO
PDF下载: 下载PDF文件 查看货源
内容描述: 基于闪存的8位CMOS微控制器 [FLASH-Based 8-Bit CMOS Microcontrollers]
分类和应用: 闪存微控制器和处理器外围集成电路光电二极管PC时钟
文件页数/大小: 160 页 / 1657 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F62X  
The PIC16F62X devices contain an 8-bit ALU and  
working register. The ALU is a general purpose  
arithmetic unit. It performs arithmetic and Boolean  
functions between data in the working register and any  
register file.  
3.0  
ARCHITECTURAL OVERVIEW  
The high performance of the PIC16F62X family can be  
attributed to a number of architectural features  
commonly found in RISC microprocessors. To begin  
with, the PIC16F62X uses a Harvard architecture, in  
which, program and data are accessed from separate  
memories using separate busses. This improves  
bandwidth over traditional von Neumann architecture  
where program and data are fetched from the same  
memory. Separating program and data memory further  
allows instructions to be sized differently than 8-bit wide  
data word. Instruction opcodes are 14-bits wide making  
it possible to have all single word instructions. A 14-bit  
wide program memory access bus fetches a 14-bit  
instruction in a single cycle. A two-stage pipeline over-  
laps fetch and execution of instructions. Consequently,  
all instructions (35) execute in a single-cycle (200 ns @  
20 MHz) except for program branches.  
The ALU is 8-bit wide and capable of addition,  
subtraction, shift and logical operations. Unless  
otherwise mentioned, arithmetic operations are two's  
complement in nature. In two-operand instructions,  
typically one operand is the working register  
(W register). The other operand is a file register or an  
immediate constant. In single operand instructions, the  
operand is either the W register or a file register.  
The W register is an 8-bit working register used for ALU  
operations. It is not an addressable register.  
Depending on the instruction executed, the ALU may  
affect the values of the Carry (C), Digit Carry (DC), and  
Zero (Z) bits in the STATUS register. The C and DC bits  
operate as a Borrow and Digit Borrow out bit,  
respectively, bit in subtraction. See the SUBLW and  
SUBWFinstructions for examples.  
The Table below lists program memory (Flash, Data  
and EEPROM).  
Memory  
A simplified block diagram is shown in Figure 3-1, with  
a description of the device pins in Table 3-1.  
Device  
FLASH  
Program  
RAM  
Data  
EEPROM  
Data  
Two types of data memory are provided on the  
PIC16F62X devices. Non-volatile EEPROM data  
memory is provided for long term storage of data such  
as calibration values, look up table data, and any other  
data which may require periodic updating in the field.  
This data is not lost when power is removed. The other  
data memory provided is regular RAM data memory.  
Regular RAM data memory is provided for temporary  
storage of data during normal operation. It is lost when  
power is removed.  
PIC16F627  
PIC16F628  
PIC16LF627  
PIC16LF628  
1024 x 14  
2048 x 14  
1024 x 14  
2048 x 14  
224 x 8  
224 x 8  
224 x 8  
224 x 8  
128 x 8  
128 x 8  
128 x 8  
128 x 8  
The PIC16F62X can directly or indirectly address its  
register files or data memory. All special function  
registers including the program counter are mapped in  
the data memory. The PIC16F62X have an orthogonal  
(symmetrical) instruction set that makes it possible to  
carry out any operation on any register using any  
addressing mode. This symmetrical nature and lack of  
‘special optimal situations’ make programming with the  
PIC16F62X simple yet efficient. In addition, the  
learning curve is reduced significantly.  
1999 Microchip Technology Inc.  
Preliminary  
DS40300B-page 9