ATEVK1105 Atmel, ATEVK1105 Datasheet - Page 378

• Manufacturer Part Number: ATEVK1105
• Description: KIT EVAL FOR AT32UC3A0
• Manufacturer: Atmel
• Series: AVR®32r
• Type: MCUr

Specifications of ATEVK1105

• Contents: Evaluation Board, Software and Documentation
• Processor To Be Evaluated: AT32UC3A0512
• Processor Series: AVR
• Data Bus Width: 32 bit
• Interface Type: USART, TWI, USB, SPI, Ethernet
• Operating Supply Voltage: 3.3 V
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: AVR UC3
• Silicon Core Number: AT32UC3A0512
• Silicon Family Name: AVR
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT32UC3A0
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.6.4.3
27.6.4.4
32058J–AVR32–04/11
– NWE Waveforms
Write Waveforms
NCS Waveforms
Figure 27-12. READ_MODE = 0: Data is sampled by SMC before the rising edge of NCS
The write protocol is similar to the read protocol. It is depicted in
starts with the address setting on the memory address bus.
The NWE signal is characterized by a setup timing, a pulse width and a hold timing.
1. NWE_SETUP: the NWE setup time is defined as the setup of address and data before
2. NWE_PULSE: The NWE pulse length is the time between NWE falling edge and NWE
3. NWE_HOLD: The NWE hold time is defined as the hold time of address and data after
The NWE waveforms apply to all byte-write lines in Byte Write access mode: NWR0 to NWR3.
The NCS signal waveforms in write operation are not the same that those applied in read opera-
tions, but are separately defined:
1. NCS_WR_SETUP: the NCS setup time is defined as the setup time of address before
2. NCS_WR_PULSE: the NCS pulse length is the time between NCS falling edge and NCS
3. NCS_WR_HOLD: the NCS hold time is defined as the hold time of address after the
NBS0, NBS1,
the NWE falling edge;
rising edge;
the NWE rising edge.
the NCS falling edge.
rising edge;
NCS rising edge.
A0, A1
CLK_SMC
D[15:0]
A[25:2]
NRD
NCS
t
PACC
Data Sampling
Figure
27-13. The write cycle
AT32UC3A
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