參數(shù)資料
型號: PIC16LC715
廠商: Microchip Technology Inc.
英文描述: 8-Bit CMOS Microcontrollers with A/D Converter
中文描述: 8位CMOS微控制器與A / D轉(zhuǎn)換器
文件頁數(shù): 73/176頁
文件大小: 803K
代理商: PIC16LC715
1997 Microchip Technology Inc.
DS30272A-page 73
PIC16C71X
BTFSS
Syntax:
Operands:
Bit Test f, Skip if Set
[label BTFSS f,b
0
f
127
0
b < 7
skip if (f<b>) = 1
None
Operation:
Status Affected:
Encoding:
Description:
01
11bb
bfff
ffff
If bit 'b' in register 'f' is '0' then the next
instruction is executed.
If bit 'b' is '1', then the next instruction is
discarded and a NOP is executed
instead, making this a 2T
CY
instruction.
1
1(2)
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
Decode
Read
register 'f'
Process
data
NOP
If Skip:
(2nd Cycle)
Q1
Q2
Q3
Q4
NOP
NOP
NOP
NOP
Example
HERE
FALSE
TRUE
BTFSC
GOTO
FLAG,1
PROCESS_CODE
Before Instruction
PC =
address
HERE
After Instruction
if FLAG<1> = 0,
PC = address
FALSE
if FLAG<1> = 1,
PC = address
TRUE
CALL
Syntax:
Operands:
Operation:
Call Subroutine
[ label CALL k
0
k
2047
(PC)+ 1
TOS,
k
PC<10:0>,
(PCLATH<4:3>)
PC<12:11>
None
Status Affected:
Encoding:
Description:
10
0kkk
kkkk
kkkk
Call Subroutine. First, return address
(PC+1) is pushed onto the stack. The
eleven bit immediate address is loaded
into PC bits <10:0>. The upper bits of
the PC are loaded from PCLATH.
CALL
is a two cycle instruction.
1
2
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
1st Cycle
Decode
Read
literal 'k',
Push PC
to Stack
Process
data
Write to
PC
2nd Cycle
NOP
NOP
NOP
NOP
Example
HERE
CALL THERE
Before Instruction
PC = Address
HERE
After Instruction
PC = Address
THERE
TOS = Address
HERE+1
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