Rev. 1.0, 02/00, page 43 of 1141
Table 2.9
System Control Instructions
Instruction
Size
*
Function
TRAPA
Starts trap-instruction exception handling
RTE
Returns from an exception-handling routine
SLEEP
Causes a transition to a power-down state
LDC
B/W
(EAs)
→
CCR, (EAs)
→
EXR
Moves contents of a general register or memory or immediate
data to CCR or EXR. Although CCR and EXR are 8-bit
registers, word-size transfers are performed between them and
memory. The upper 8 bits are valid
STC
B/W
CCR
→
(EAd), EXR
→
(EAd)
Transfers CCR or EXR contents to a general register or memory.
Although CCR and EXR are 8-bit registers, word-size transfers
are performed between them and memory. The upper 8 bits are
valid
ANDC
B
CCR
∧
#IMM
→
CCR, EXR
∧
#IMM
→
EXR
Logically ANDs the CCR or EXR contents with immediate data
ORC
B
CCR
∨
#IMM
→
CCR, EXR
∨
#IMM
→
EXR
Logically ORs the CCR or EXR contents with immediate data
XORC
B
CCR
⊕
#IMM
→
CCR, EXR
⊕
#IMM
→
EXR
Logically exclusive-ORs the CCR or EXR contents with
immediate data
NOP
PC + 2
→
PC
Only increments the program counter
Note:
*
Size refers to the operand size.
B:
Byte
W: Word