23
6174B–ATARM–07-Nov-05
AT91FR40162S Preliminary
10.4
Data Bus Width
A data bus width of 8 or 16 bits can be selected for each chip select. This option is controlled by
the DBW field in the EBI_CSR (Chip Select Register) for the corresponding chip select.
shows how to connect a 512K x 8-bit memory on NCS2.
Figure 10-4. Memory Connection for an 8-bit Data Bus
shows how to connect a 512K x 16-bit memory on NCS2.
Figure 10-5. Memory Connection for a 16-bit Data Bus
EBI
D0 - D7
D8 - D15
A1 - A18
A0
NWR0
NRD
NCS2
D0 - D7
A1 - A18
A0
Write Enable
Output Enable
Memory Enable
NWR1
EBI
D0 - D7
D8 - D15
A1 - A19
NLB
NWE
NOE
NCS2
D0 - D7
D8 - D15
A0 - A18
Low Byte Enable
Write Enable
Output Enable
Memory Enable
NUB
High Byte Enable
Содержание AT91FR40162S
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Страница 204: ...204 6174B ATARM 07 Nov 05 AT91FR40162S Preliminary 23 AT91FR40162S Errata There is no known errata for the AT91FR40162S...