Datasheet

Central Processing Unit (CPU)
Instruction Set Summary
MC68HC908GR8 — Rev 4.0 Technical Data
MOTOROLA Central Processing Unit (CPU) 149
BNE rel Branch if Not Equal PC ← (PC) + 2 + rel ? (Z) = 0 ––––––REL 26 rr 3
BPL rel Branch if Plus PC
← (PC) + 2 + rel ? (N) = 0 ––––––REL 2A rr 3
BRA rel Branch Always PC
← (PC) + 2 + rel ––––––REL 20 rr 3
BRCLR n,opr,rel Branch if Bit n in M Clear PC
← (PC) + 3 + rel ? (Mn) = 0 –––––↕
DIR (b0)
DIR (b1)
DIR (b2)
DIR (b3)
DIR (b4)
DIR (b5)
DIR (b6)
DIR (b7)
01
03
05
07
09
0B
0D
0F
dd rr
dd rr
dd rr
dd rr
dd rr
dd rr
dd rr
dd rr
5
5
5
5
5
5
5
5
BRN rel Branch Never PC
← (PC) + 2 ––––––REL 21 rr 3
BRSET n,opr,rel Branch if Bit n in M Set PC
← (PC) + 3 + rel ? (Mn) = 1 –––––↕
DIR (b0)
DIR (b1)
DIR (b2)
DIR (b3)
DIR (b4)
DIR (b5)
DIR (b6)
DIR (b7)
00
02
04
06
08
0A
0C
0E
dd rr
dd rr
dd rr
dd rr
dd rr
dd rr
dd rr
dd rr
5
5
5
5
5
5
5
5
BSET n,opr Set Bit n in M Mn
← 1 ––––––
DIR (b0)
DIR (b1)
DIR (b2)
DIR (b3)
DIR (b4)
DIR (b5)
DIR (b6)
DIR (b7)
10
12
14
16
18
1A
1C
1E
dd
dd
dd
dd
dd
dd
dd
dd
4
4
4
4
4
4
4
4
BSR rel Branch to Subroutine
PC
← (PC) + 2; push (PCL)
SP
← (SP) – 1; push (PCH)
SP
← (SP) – 1
PC
← (PC) + rel
––––––REL AD rr 4
CBEQ opr,rel
CBEQA #opr,rel
CBEQX #opr,rel
CBEQ opr,X+,rel
CBEQ X+,rel
CBEQ opr,SP,rel
Compare and Branch if Equal
PC
← (PC) + 3 + rel ? (A) – (M) = $00
PC
← (PC) + 3 + rel ? (A) – (M) = $00
PC
← (PC) + 3 + rel ? (X) – (M) = $00
PC
← (PC) + 3 + rel ? (A) – (M) = $00
PC
← (PC) + 2 + rel ? (A) – (M) = $00
PC
← (PC) + 4 + rel ? (A) – (M) = $00
––––––
DIR
IMM
IMM
IX1+
IX+
SP1
31
41
51
61
71
9E61
dd rr
ii rr
ii rr
ff rr
rr
ff rr
5
4
4
5
4
6
CLC Clear Carry Bit C
← 0 –––––0INH 98 1
CLI Clear Interrupt Mask I
← 0 ––0 –––INH 9A 2
CLR opr
CLRA
CLRX
CLRH
CLR opr,X
CLR ,X
CLR opr,SP
Clear
M
← $00
A
← $00
X
← $00
H
← $00
M
← $00
M
← $00
M
← $00
0 ––01–
DIR
INH
INH
INH
IX1
IX
SP1
3F
4F
5F
8C
6F
7F
9E6F
dd
ff
ff
3
1
1
1
3
2
4
Table 10-1. Instruction Set Summary (Continued)
Source
Form
Operation Description
Effect on
CCR
Address Mode Opcode Operand Cycles
VH I NZC
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...