Analog Devices ADSP-21261 SHARC Hardware Reference Manual page 270

Internal Memory Access Listings
ANY BLOCK
...
...
...
WORD Y11 WORD Y10 WORD Y9 WORD Y8
WORD Y7 WORD Y6 WORD Y5 WORD Y4
WORD Y3 WORD Y2 WORD Y1 WORD Y0
SHORT WORD ACCESS
63-48
PM DATA
0X0000
BUS
PEX REGISTERS RB
39-24 23-8 7-0
PEY REGISTERS SB
39-24 23-8 7-0
RX = DM(LONG WORD X0 ADDRESS), RA = PM(SHORT WORD Y0 ADDRESS);
OTHER INSTRUCTIONS WITH SIMILAR DATA FLOWS FOR SISD, MIXED WORD, DUAL-DATA TRANSFERS ARE:
DREG = PM(SHORT, NORMAL, EP NORMAL, LONG ADD),
PM(SHORT, NORMAL, EP NORMAL, LONG ADD) = DREG,
Figure 5-31. Mixed-Word Width Addressing of Dual-Data in SISD Mode
5-66
MEMORY
... ... ...
... ... ...
... ... ...
47-32 31-16 15-0
0X0000 0X0000 WORD Y0
RA
39-24 23-8 7-0
0X0000 †
WORD Y0
0X00
SA
39-24 23-8 7-0
THIS EXAMPLE SHOWS THE DATA FLOW FOR INSTRUCTION:
ADSP-2126x SHARC Processor Hardware Reference
ANY OTHER BLOCK
... ...
... ...
... ...
WORD X2
WORD X1
WORD X0
LONG WORD ACCESS
63-48 47-32
DM DATA
WORD X0
BUS
RY
39-24 23-8 7-0
0X00
WORD X0, 63-32
SY
39-24 23-8 7-0
DREG = DM(SHORT, NORMAL, EP NORMAL, LONG ADD);
DM(SHORT, NORMAL, EP NORMAL, LONG ADD) = DREG;
... ...
... ...
... ...
31-16 15-0
RX
39-24 23-8 7-0
WORD X0, 31-0
0X00
SX
39-24 23-8 7-0