mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 109

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

INTOUCH
Operation:
Assembler Syntax INTOUCH <Ay>
Attributes:
Description: Generates an instruction fetch reference at address (Ay). If the referenced
address space is a cacheable region, this instruction can be used to prefetch a 16-byte packet
into the processor’s instruction cache. If the referenced instruction address is a
non-cacheable space, the instruction effectively performs no operation.
The INTOUCH instruction can be used to prefetch, and with the later setting of CACR[11],
lock specific memory lines in the processor’s instruction cache. This function may be
desirable in systems where deterministic real-time performance is critical.
Condition Codes:
Instruction Fields:
Instruction
Format:
• Register field—Specifies the destination address register number.
15
1
Operand sizes supported
14
1
Opcode present
If Supervisor State
else TRAP
Unsized
Not affected.
INTOUCH
13
1
12
1
then Instruction Fetch Touch @ <Ay>
Chapter 2. ColdFire Core
11
0
Instruction Fetch Touch
10
1
ColdFire Instruction Set Architecture Enhancements
0
9
V2, V3 Core
0
8
No
—
0
7
0
6
5
1
4
0
V4 Core
INTOUCH
Yes
—
1
3
2
REGISTER
1
2-43
0