Datasheet

216
32072H–AVR32–10/2012
AT32UC3A3
15.7.4 Mode Register
Register Name: MODE
Access Type: Read/Write
Offset: 0x0C + CS_number*0x10
Reset Value: 0x10002103
• 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.
• TDFMODE: 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.
• TDFCYCLES: 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 TDFCYCLES period. The external
bus cannot be used by another chip select during TDFCYCLES plus one cycles. From 0 up to 15 TDFCYCLES can be set.
31 30 29 28 27 26 25 24
––
PS
–––
PMEN
23 22 21 20 19 18 17 16
–––
TDFMODE TDFCYCLES
15 14 13 12 11 10 9 8
––
DBW
–––
BAT
76543210
––
EXNWMODE
––WRITEMODE
READMODE
PS Page Size
0 4-byte page
1 8-byte page
2 16-byte page
3 32-byte page