Digi NS9750 User Manual
Page 179
w w w . d i g i e m b e d d e d . c o m
1 5 5
M e m o r y C o n t r o l l e r
Access: Read, little endian, 16-bit
external bus
External data mapping on to system
databus
Internal
transfer
width
HRDATA to DATA
HSIZE
[2:0]
HADDR
[1:0]
ADDROUT
[0]
BLSOU
T [1:0]
[31:24]
23:16]
[15:8]
[7:0]
Word (2
transfers
010
--
1
0
00
00
[15:8]
-
[7:0]
-
-
[15:8]
-
[7:0]
Halfword
001
1-
1
00
[15:8]
[7:0]
-
-
Halfword
001
0-
0
00
-
-
[15:8]
[7:0]
Byte
000
11
1
01
[15:8]
-
-
-
Byte
000
10
1
10
-
[7:0]
-
-
Byte
000
01
0
01
-
-
[15:8]
-
Byte
000
00
0
10
-
-
-
[7:0]
Table 80: Little endian read, 16-bit external bus
Access: Read, little endian, 32-bit
external bus
External data mapping on to system
databus
Internal
transfer
width
HRDATA to DATA
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 (2
transfers)
001
0-
1100
-
-
[15:8]
[7:0]
Byte
000
11
0111
[31:24]
-
-
-
Table 81: Little endian read, 32-bit external bus