AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 431

• Manufacturer Part Number: AT91SAM9G45-CU-999
• Description: IC MCU ARM9 APMC 324TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9G45-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 400MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: ROM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 1.1 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 324-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Figure 29-8.
6438F–ATARM–21-Jun-10
(from master)
(from slave)
TXEMPTY
NPCS0
SPCK
TDRE
MOSI
RDRF
MISO
SPI_TDR
Write in
Status Register Flags Behavior
Figure 29-8
Transmission Register Empty (TXEMPTY) status flags behavior within the SPI_SR (Status Reg-
ister) during an 8-bit data transfer in fixed mode and no Peripheral Data Controller involved.
Figure 29-9
of TX buffer (ENDTX), RX Buffer Full (RXBUFF) and TX Buffer Empty (TXBUFE) status flags
behavior within the SPI_SR (Status Register) during an 8-bit data transfer in fixed mode with the
Peripheral Data Controller involved. The PDC is programmed to transfer and receive three data.
The next pointer and counter are not used. The RDRF and TDRE are not shown because these
flags are managed by the PDC when using the PDC.
MSB
1
MSB
shows Transmit Data Register Empty (TDRE), Receive Data Register (RDRF) and
shows Transmission Register Empty (TXEMPTY), End of RX buffer (ENDRX), End
2
6
6
3
5
5
4
4
4
5
3
3
6
6
2
2
7
1
1
shift register empty
AT91SAM9G45
8
LSB
LSB
RDR read
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