Texas Instruments TMS320C54x, User Manual

Page: 153 / 469

.mmregs
Assign Memory–Mapped Register Names as Global Symbols
4-70
Syntax
.mmregs
Description The .mmregs directive defines global symbolic names for the ’C54x registers
and places them in the global symbol table. It is equivalent to executing AL .set
8, AH .set 9, etc. The symbols are local and absolute. Using the .mmregs direc-
tive makes it unnecessary to define these symbols.
Table 4–2. Memory-Mapped Registers
Name
Hexadecimal-
Address
Description
IMR 0000 Interrupt mask register
IFR 0001 Interrupt flag register
– 2–5 Reserved
ST0 0006 Status 0 register
ST1 0007 Status 1 register
AL 0008 A accumulator low (A [15:0])
AH 0009 A accumulator high (A [31:16])
AG 000A A accumulator guard (A [39:32])
BL 000B B accumulator low (B [15:0])
BH 000C B accumulator high (B [31:16])
BG 000D B accumulator guard (B [39:32])
T 000E Temporary register
TRN 000F Transition register
BK 0019 Circular size register
BRC 001A Block repeat counter
RSA 001B Block repeat start address
REA 001C Block repeat end address
PMST 001D PMST register
DRR0 0020 Data receive register 0
BDRR 0020 Data receive register
Note: Duplication of address values in the table supports the different names of the registers
as they are implemented on different ’C54x devices.