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LDP
Load Data Page Pointer
7-84
Cycles for a Single LDP Instruction (Using Direct and Indirect Addressing)
Program
Operand ROM DARAM SARAM External
DARAM 2 2 2 2+p
code
SARAM 2 2 2, 3
†
2+p
code
External 2+d
src
2+d
src
2+d
src
3+d
src
+p
code
†
If the operand and the code are in the same SARAM block
Cycles for a Repeat (RPT) Execution of an LDP Instruction (Using Direct and
Indirect Addressing)
Program
Operand ROM DARAM SARAM External
DARAM 2n 2n 2n 2n+p
code
SARAM 2n 2n 2n, 2n+1
†
2n+p
code
External 2n+nd
src
2n+nd
src
2n+nd
src
2n+1+nd
src
p
code
†
If the operand and the code are in the same SARAM block
Cycles for a Single LDP Instruction (Using Short Immediate Addressing)
ROM
DARAM SARAM External
2 2 2 2+p
code
Example 1 LDP 127 ;(DP = 511: addresses FF80h–FFFFh)
Before Instruction After Instruction
Data Memory Data Memory
FFFFh FEDCh FFFFh FEDCh
DP 1FFh DP 0DCh
Example 2 LDP #0h
Before Instruction After Instruction
DP 1FFh DP 0h
Example 3 LDP *,AR5
Before Instruction After Instruction
ARP 4 ARP 5
AR4 300h AR4 300h
Data Memory Data Memory
300h 06h 300h 06h
DP 1FFh DP 06h
Cycles