參數(shù)資料
型號: PIC16CR620A
廠商: Microchip Technology Inc.
元件分類: 8位微控制器
英文描述: EPROM-Based 8-Bit CMOS Microcontroller
中文描述: 存儲器為基礎(chǔ)的8位CMOS微控制器
文件頁數(shù): 65/108頁
文件大小: 645K
代理商: PIC16CR620A
1998 Microchip Technology Inc.
Preliminary
DS30235G-page 65
PIC16C62X
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 '1' then the next
instruction is skipped.
If bit 'b' is '1', then the next instruction
fetched during the current instruction
execution, is discarded and a NOP is
executed instead, making this a
two-cycle instruction.
1
1(2)
Words:
Cycles:
Example
HERE
FALSE
TRUE
BTFSS
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
Words:
Cycles:
Example
HERE
CALL THERE
Before Instruction
PC = Address
HERE
After Instruction
PC = Address
THERE
TOS = Address
HERE+1
CLRF
Syntax:
Operands:
Operation:
Clear f
[ label CLRF f
0
f
127
00h
(f)
1
Z
Z
Status Affected:
Encoding:
Description:
00
0001
1fff
ffff
The contents of register 'f' are cleared
and the Z bit is set.
1
1
Words:
Cycles:
Example
CLRF
FLAG_REG
Before Instruction
FLAG_REG
=
0x5A
After Instruction
FLAG_REG
Z
=
=
0x00
1
CLRW
Syntax:
Operands:
Operation:
Clear W
[ label CLRW
None
00h
(W)
1
Z
Z
Status Affected:
Encoding:
Description:
00
0001
0000
0011
W register is cleared. Zero bit (Z) is
set.
1
1
Words:
Cycles:
Example
CLRW
Before Instruction
W
=
0x5A
After Instruction
W
Z
=
=
0x00
1
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