SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 218
Version 1.1
or EBI automatically perform a read-modify-write sequence when a byte lane is not available.
AHB Transaction
8-bit External Device
Transaction
16-bit External Device Transaction
(Enable Byte Control)
16-bit External Device Transaction
(Disable Byte Control)
8-bit Read
1 x 8-bit Read
1 x 8-bit Read
(using Byte Control)
1 x 16-bit Read
(EBI ignores the redundant data)
8-bit Write
1 x 8-bit Write
1 x 8-bit Write
(using Byte Control)
1 x 16-bit Read
(modify)
1 x 16-bit Write
16-bit Read
2 x 8-bit Read
1 x 16-bit Read
1 x 16-bit Read
16-bit Write
2 x 8-bit Write
1 x 16-bit Write
1 x 16-bit Write
32-bit Read
4 x 8-bit Read
2 x 16-bit Read
2 x 16-bit Read
32-bit Write
4 x 8-bit Write
2 x 16-bit Write
2 x 16-bit Write
External Bus
Width
Access from AHB Master
Access to EBI
Type
HADDR[1:0]
Access split
Output data
on EBI A[1:0]
Valid data on
EBI AD[15:0]
Output data
on EBI UB
Output data
on EBI LB
8-bit
8-bit
00b
No
00b
EBI AD[7:0]
1
0
01b
No
01b
10b
No
10b
11b
No
11b
16-bit
00b
1/2 access
00b
2/2 access
01b
10b
1/2 access
10b
2/2 access
11b
32-bit
00b
1/4 access
00b
2/4 access
01b
3/4 access
10b
4/4 access
11b
16-bit
8-bit
00b
No
x0b
EBI AD[7:0]
1
0
01b
No
x0b
EBI AD[15:8]
0
1
10b
No
x1b
EBI AD[7:0]
1
0
11b
No
x1b
EBI AD[15:8]
0
1
16-bit
00b
No
x0b
EBI AD[15:0]
0
0
10b
No
x1b
EBI AD[15:0]
0
0
32-bit
00b
1/2 access
x0b
EBI AD[15:0]
0
0
2/2 access
x1b
EBI AD[15:0]
0
0
Содержание SN32F280 Series
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Страница 263: ...SN32F280 Series 32 Bit Cortex M0 Micro Controller SONiX TECHNOLOGY CO LTD Page 263 Version 1 1 26 2 LQFP 64 PIN...
Страница 264: ...SN32F280 Series 32 Bit Cortex M0 Micro Controller SONiX TECHNOLOGY CO LTD Page 264 Version 1 1 26 3 LQFP 48 PIN...