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PIC16F73-I/SPG 参数 Datasheet PDF下载

PIC16F73-I/SPG图片预览
型号: PIC16F73-I/SPG
PDF下载: 下载PDF文件 查看货源
内容描述: [28 Pin, 7KB Std Flash, 192 RAM, 22 I/O, -40C to +85C, 28-SPDIP, TUBE]
分类和应用: 闪存微控制器
文件页数/大小: 174 页 / 3853 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F7X  
For example, a clrf PORTBinstruction will read  
PORTB, clear all the data bits, then write the result  
back to PORTB. This example would have the unin-  
tended result that the condition that sets the RBIF flag  
would be cleared for pins configured as inputs and  
using the PORTB interrupt-on-change feature.  
13.0 INSTRUCTION SET SUMMARY  
The PIC16 instruction set is highly orthogonal and is  
comprised of three basic categories:  
Byte-oriented operations  
Bit-oriented operations  
Literal and control operations  
TABLE 13-1: OPCODE FIELD  
DESCRIPTIONS  
Each PIC16 instruction is a 14-bit word divided into an  
opcode, which specifies the instruction type and one or  
more operands, which further specify the operation of  
the instruction. The formats for each of the categories  
are presented in Figure 13-1, while the various opcode  
fields are summarized in Table 13-1.  
Field  
Description  
f
W
b
k
x
Register file address (0x00 to 0x7F)  
Working register (accumulator)  
Bit address within an 8-bit file register  
Literal field, constant data or label  
Table 13-2 lists the instructions recognized by the  
MPASMTM Assembler. A complete description of each  
instruction is also available in the PICmicroMid-  
Range Reference Manual (DS33023).  
Don't care location (= 0or 1).  
The assembler will generate code with x = 0.  
It is the recommended form of use for  
compatibility with all Microchip software tools.  
For byte-oriented instructions, frepresents a file reg-  
ister designator and drepresents a destination desig-  
nator. The file register designator specifies which file  
register is to be used by the instruction.  
d
Destination select; d = 0: store result in W,  
d = 1: store result in file register f.  
Default is d = 1.  
The destination designator specifies where the result of  
the operation is to be placed. If dis zero, the result is  
placed in the W register. If dis one, the result is placed  
in the file register specified in the instruction.  
PC  
TO  
PD  
Program Counter  
Time-out bit  
Power-down bit  
For bit-oriented instructions, brepresents a bit field  
designator, which selects the bit affected by the opera-  
tion, while frepresents the address of the file in which  
the bit is located.  
FIGURE 13-1:  
GENERAL FORMAT FOR  
INSTRUCTIONS  
Byte-oriented file register operations  
13  
For literal and control operations, krepresents an  
eight- or eleven-bit constant or literal value  
8
7
6
0
OPCODE  
d
f (FILE #)  
One instruction cycle consists of four oscillator periods;  
for an oscillator frequency of 4 MHz, this gives a normal  
instruction execution time of 1 µs. All instructions are  
executed within a single instruction cycle, unless a con-  
ditional test is true, or the program counter is changed  
as a result of an instruction. When this occurs, the exe-  
cution takes two instruction cycles, with the second  
cycle executed as a NOP.  
d = 0 for destination W  
d = 1 for destination f  
f = 7-bit file register address  
Bit-oriented file register operations  
13 10 9  
b (BIT #)  
7
6
0
OPCODE  
f (FILE #)  
b = 3-bit bit address  
f = 7-bit file register address  
Note: To maintain upward compatibility with  
future PIC16F7X products, do not use the  
OPTIONand TRISinstructions.  
Literal and control operations  
All instruction examples use the format 0xhhto repre-  
sent a hexadecimal number, where hsignifies a hexa-  
decimal digit.  
General  
13  
8
7
0
0
OPCODE  
k (literal)  
13.1 READ-MODIFY-WRITE  
OPERATIONS  
k = 8-bit immediate value  
CALLand GOTOinstructions only  
13 11 10  
OPCODE  
k = 11-bit immediate value  
Any instruction that specifies a file register as part of  
the instruction performs a Read-Modify-Write (R-M-W)  
operation. The register is read, the data is modified,  
and the result is stored according to either the instruc-  
tion, or the destination designator d. A read operation  
is performed on a register even if the instruction writes  
to that register.  
k (literal)  
2002 Microchip Technology Inc.  
DS30325B-page 105