M42800A Atmel Corporation, M42800A Datasheet - Page 185

• Manufacturer Part Number: M42800A
• Manufacturer: Atmel Corporation

Specifications of M42800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 54
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• 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

19.4
Figure 19-5. SPI Transfer Format (NCPHA = 1, 8 Bits per Transfer)
Figure 19-6. SPI Transfer Format (NCPHA = 0, 8 Bits per Transfer)
1779D–ATARM–14-Apr-06
SPCK Cycle (for reference)
SPCK Cycle (for reference)
NSS (to Slave)
NSS (to Slave)
(from Master)
(from Master)
(from Slave)
(from Slave)
Data Transfer
(CPOL = 0)
(CPOL = 1)
(CPOL = 0)
(CPOL = 1)
SPCK
SPCK
SPCK
SPCK
MOSI
MISO
MOSI
MISO
X
The following waveforms show examples of data transfers.
MSB
1
1
MSB
MSB
MSB
2
2
6
6
6
6
3
3
5
5
5
5
4
4
4
4
4
4
5
5
3
3
3
3
6
6
6
6
2
2
2
2
7
7
1
1
1
1
AT91M42800A
8
8
LSB
LSB
LSB
LSB
X
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