SAM3X8C Atmel Corporation, SAM3X8C Datasheet - Page 511

• Manufacturer Part Number: SAM3X8C
• Manufacturer: Atmel Corporation

• BAT: Byte Access Type
This field is used only if DBW defines a 16-bit data bus.
• DBW: Data Bus Width
• 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
external bus cannot be used by another chip select during TDF_CYCLES + 1 cycles. From 0 up to 15 TDF_CYCLES can
be set.
• TDF_MODE: TDF Optimization
1: TDF optimization is enabled.
0: TDF optimization is disabled.
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
• 1: Byte write access type:
• 0: Byte select access type:
– Write operation is controlled using NCS, NWR0, NWR1.
– Read operation is controlled using NCS and NRD.
– Write operation is controlled using NCS, NWE, NBS0, NBS1.
– Read operation is controlled using NCS, NRD, NBS0, NBS1.
– The number of TDF wait states is optimized using the setup period of the next read/write access.
– The number of TDF wait states is inserted before the next access begins.
Value
0
1
BIT_16
Name
BIT_8
Description
16-bit bus
8-bit bus
SAM3X/A
SAM3X/A
511
511