Datasheet

407
AT32UC3A
27.7.4 MODE Register
Register Name: MODE[0..3]
Access Type: Read/Write
Offset: 0x10 x CS_number + 0x0C
Reset Value: –
• PS: Page Size
If page mode is enabled, this field indicates the size of the page in bytes.
• PMEN: Page Mode Enabled
1: Asynchronous burst read in page mode is applied on the corresponding chip select.
0: Standard read is applied.
• TDF_MODE: TDF Optimization
1: TDF optimization is enabled.
– The number of TDF wait states is optimized using the setup period of the next read/write access.
0: TDF optimization is disabled.
– The number of TDF wait states is inserted before the next access begins.
• TDF_CYCLES: Data Float Time
This field gives the integer number of clock cycles required by the external device to release the data after the rising edge
of the read controlling signal. The SMC always provide one full cycle of bus turnaround after the TDF_CYCLES period. The
31 30 29 28 27 26 25 24
– – PS – – – PMEN
23 22 21 20 19 18 17 16
– – – TDF_MODE TDF_CYCLES
15 14 13 12 11 10 9 8
– – DBW – – – BAT
7 6 5 4 3 2 1 0
– – EXNW_MODE – –
WRITE_MOD
E
READ_MODE
Table 27-8. Page size settings.
PS Page Size
0 0 4-byte page
0 1 8-byte page
1 0 16-byte page
1 1 32-byte page
32058K
AVR32-01/12