PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 224

• Manufacturer Part Number: PIC18F1230
• Description: 18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F1230/1330
BZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39758B-page 222
Q Cycle Activity:
If Jump:
If No Jump:
Before Instruction
After Instruction
operation
Decode
Decode
Q1
No
Q1
PC
If Zero
If Zero
PC
PC
Read literal
Read literal
operation
Branch if Zero
BZ
-128
if Zero bit is ‘1’
(PC) + 2 + 2n
None
If the Zero bit is ‘1’, then the program
will branch.
The 2’s complement number ‘2n’ is
added to the PC. Since the PC will
have incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is then a
two-cycle instruction.
1
1(2)
HERE
1110
Q2
No
Q2
‘n’
‘n’
=
=
=
=
=
n
n
address (HERE)
1;
address (Jump)
0;
address (HERE + 2)
127
0000
BZ
operation
Process
Process
Data
Data
PC
Q3
Q3
No
Jump
nnnn
Advance Information
operation
operation
Write to
Q4
PC
Q4
No
No
nnnn
CALL
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
1st word (k<7:0>)
2nd word(k<19:8>)
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
Before Instruction
After Instruction
operation
Decode
PC
PC
TOS
WS
BSRS
STATUSS =
Q1
No
=
=
=
=
=
Read literal
operation
Subroutine Call
CALL k {,s}
0
s
(PC) + 4
k
if s = 1
(W)
(STATUS)
(BSR)
None
Subroutine call of entire 2-Mbyte
memory range. First, return address
(PC + 4) is pushed onto the return
stack. If ‘s’ = 1, the W, STATUS and
BSR registers are also pushed into their
respective shadow registers, WS,
STATUSS and BSRS. If ‘s’ = 0, no
update occurs (default). Then, the
20-bit value ‘k’ is loaded into PC<20:1>.
CALL
2
2
HERE
‘k’<7:0>,
1110
1111
Q2
No
address (HERE)
address (THERE)
address (HERE + 4)
W
BSR
STATUS
k
[0,1]
PC<20:1>
© 2006 Microchip Technology Inc.
is a two-cycle instruction.
WS,
1048575
BSRS
k
TOS,
110s
PUSH PC to
CALL
19
STATUSS,
operation
kkk
stack
Q3
No
THERE, 1
k
kkkk
7
kkk
Read literal
Write to PC
‘k’<19:8>,
operation
Q4
No
kkkk
kkkk
0
8