AT91RM9200-QI-002 Atmel, AT91RM9200-QI-002 Datasheet - Page 379

• Manufacturer Part Number: AT91RM9200-QI-002
• Description: IC ARM9 MCU 208 PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-QI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

28.5.2
1768I–ATARM–09-Jul-09
SPI Slave Mode
In Slave Mode, the SPI waits for NSS to go active low before receiving the serial clock from an
external master.
In Slave Mode, CPOL, NCPHA and BITS fields of SPI_CSR0 are used to define the transfer
characteristics. The other Chip Select Registers are not used in Slave Mode.
In Slave Mode, the low and high pulse durations of the input clock on SPCK must be longer than
two Master Clock periods.
Figure 28-6. Slave Mode Block Diagram
SPCK
SPIDIS
NSS
MOSI
SPIEN
S
R
Q
LSB
SPI_RDR
SPI_TDR
Serializer
RD
TD
MSB
SPI_IMR
SPI_IDR
SPI_IER
SPI_SR
N
S
P
E
S
I
D
R
T
E
AT91RM9200
R
D
R
F
O
V
R
E
SPI Interrupt
MISO
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