參數(shù)資料
型號： 16F84A
廠商： Microchip Technology Inc.
英文描述： CAT 5E CROSSOVER PATCH CORD CABLE BLUE 20 FT
中文描述： 18引腳閃存/ EEPROM的8位微控制器
文件頁數(shù)： 57/124頁
文件大?。?/td> 1322K
代理商： 16F84A
PIC16F8X
1998 Microchip Technology Inc.
DS30430C-page 57
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
No-Operat
ion
If Skip:
(2nd Cycle)
Q1
Q2
Q3
Q4
No-Operat
ion
No-Operati
on
No-Opera
tion
No-Operat
ion
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
No-Opera
tion
No-Opera
tion
No-Opera
tion
No-Operat
ion
Example
HERE
CALL THERE
Before Instruction
PC = Address
HERE
After Instruction
PC = Address
THERE
TOS = Address
HERE+1
相關(guān)PDF資料
PDF描述
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