ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 373

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 25-19. TDF Optimization: No TDF wait states are inserted if the TDF period is over when the next access begins
25.13.3
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
D[15:0]
A [23:2]
NCS0
NWE
MCK
NRD
TDF Optimization Disabled (TDF_MODE = 0)
read access on NCS0 (NRD controlled)
When optimization is disabled, tdf wait states are inserted at the end of the read transfer, so that
the data float period ends when the second access begins. If the hold period of the read1 con-
trolling signal overlaps the data float period, no additional tdf wait states will be inserted.
Figure
with no TDF optimization.
• read access followed by a read access on another chip select,
• read access followed by a write access on another chip select,
• read access followed by a write access on the same chip select,
25-20,
Figure 25-21
NRD_HOLD= 4
TDF_CYCLES = 6
and
Figure 25-22
Read to Write
Wait State
NWE_SETUP= 3
illustrate the cases:
write access on NCS0 (NWE controlled)
SAM3U Series
SAM3U Series
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