Texas Instruments TMS320C2XX User Manual
Page 236
Load Data Page Pointer
LDP
7-83
Assembly Language Instructions
Syntax
LDP
dma
Direct addressing
LDP
ind [, ARn]
Indirect addressing
LDP #
k
Short immediate
addressing
Operands
dma:
7 LSBs of the data-memory address
n:
Value from 0 to 7 designating the next auxiliary register
k:
9-bit short immediate value
ind:
Select one of the following seven options:
* *+ *– *0+ *0– *BR0+ *BR0–
LDP
dma
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
1
1
0
1
0
dma
LDP
ind [, ARn]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
1
1
0
1
1
ARU
N
NAR
Note:
ARU, N, and NAR are defined in Section 6.3,
Indirect Addressing Mode (page 6-9).
LDP #
k
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
0
1
1
1
1
0
k
Execution
Increment PC, then ...
Event
Addressing mode
Nine LSBs of (data-memory address)
→
DP
Direct or indirect
k
→
DP
Short immediate
Status Bits
Affects
DP
Description
The nine LSBs of the contents of the addressed data-memory location or a
9-bit immediate value is loaded into the data page pointer (DP) of status regis-
ter ST0. The DP can also be loaded by the LST instruction.
In direct addressing, the 9-bit DP and the 7-bit value specified in the instruction
(dma) are concatenated to form the 16-bit data-memory address accessed by
the instruction. The DP provides the 9 MSBs, and dma provides the 7 LSBs.
Words
1
Opcode