ATEVK1104 Atmel, ATEVK1104 Datasheet - Page 380

• Manufacturer Part Number: ATEVK1104
• Description: KIT DEV/EVAL FOR AVR32 AT32UC3A
• Manufacturer: Atmel
• Series: AVR®32r
• Type: MCUr

Specifications of ATEVK1104

• Contents: Evaluation Board, Software and Documentation
• Processor To Be Evaluated: AT32UC3A3
• Data Bus Width: 32 bit
• Interface Type: USB, SPI, USART
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: AVR UC3
• Silicon Core Number: AT32UC3A3256
• Silicon Family Name: AVR
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT32UC3A3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.6.4.5
32058J–AVR32–04/11
– Null Pulse
– Write is Controlled by NWE (WRITE_MODE = 1):
Write Mode
Figure 27-14. Null Setup and Hold Values of NCS and NWE in Write Cycle
Programming null pulse is not permitted. Pulse must be at least set to 1. A null value leads to
unpredictable behavior.
The WRITE_MODE parameter in the MODE register of the corresponding chip select indicates
which signal controls the write operation.
Figure 27-15
put on the bus during the pulse and hold steps of the NWE signal. The internal data buffers are
turned out after the NWE_SETUP time, and until the end of the write cycle, regardless of the
programmed waveform on NCS.
NBS0, NBS1,
NWE0, NWE1
A0, A1
CLK_SMC
NWE,
NCS
D[15:0]
A[25:2]
shows the waveforms of a write operation with WRITE_MODE set to 1. The data is
NCS_WR_SETUP
NWE_SETUP
NWE_CYCLE
NCS_WR_PULSE
NWE_PULSE
NWE_CYCLE
NCS_WR_PULSE
NWE_PULSE
NWE_CYCLE
AT32UC3A
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