M55800A Atmel Corporation, M55800A Datasheet - Page 195

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

Specifications of M55800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 176
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 58
• Ext Interrupts: 58
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 3
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 72
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

20.3
1745F–ATARM–06-Sep-07
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 SP_CSR0 are used to define the transfer char-
acteristics. The other Chip Select Registers are not used in slave mode.
Figure 2. SPI in Slave Mode
SPIDIS
SCK
NSS
MOSI
SPIEN
R
S
Q
LSB
SP_RDR
SP_TDR
Serializer
RD
TD
MSB
SP_IMR
SP_IDR
SP_IER
SP_SR
N
S
P
E
S
I
T
D
R
E
AT91M5880A
R
D
R
F
O
R
V
E
SPIRQ
MISO
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