Digi NS9750 User Manual
Page 181
w w w . d i g i e m b e d d e d . c o m
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M e m o r y C o n t r o l l e r
Access: Write, little endian, 16-bit
external bus
System data mapping on to external
databus
Internal
transfer
width
DATA to HRDATA
HSIZE
[2:0]
HADD
R [1:0]
ADDROUT
[0]
BLSOU
T [1:0]
[31:24]
[23:16]
[15:8]
[7:0]
Word (2
transfers
010
--
1
0
00
00
--
-
-
-
[31:24]
[15:8]
[23:16]
[7:0]
Halfword
001
1-
1
00
-
-
[31:24]
[23:16]
Halfword
001
0-
0
00
-
-
[15:8]
[7:0]
Byte
000
11
1
01
-
-
[31:24]
-
Byte
000
10
1
10
-
-
-
[23:16]
Byte
000
01
0
01
-
-
[15:8]
-
Byte
000
00
0
10
-
-
-
[7:0]
Table 83: Little endian write, 16-bit external bus
Access: Write, little endian, 32-bit
external bus
System data mapping on to external
databus
Internal
transfer
width
DATA to HRDATA
HSIZE
[2:0]
HADDR
[1:0]
BLSOUT
[3:0]
[31:24]
[23:16]
[15:8]
[7:0]
Word
010
--
0000
[31:24]
[23:16]
[15:8]
[7:0]
Halfword
001
1-
0011
[31:24]
[23:16]
-
-
Halfword 001
0-
1100
-
-
[15:8]
[7:0]
Byte
000
11
0111
[31:24]
-
-
-
Byte
000
10
1011
-
[23:16]
-
-
Table 84: Little endian write, 32-bit external bus