SAM9XE512 Atmel Corporation, SAM9XE512 Datasheet - Page 462

• Manufacturer Part Number: SAM9XE512
• Manufacturer: Atmel Corporation

Specifications of SAM9XE512

• Flash (kbytes): 512 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 180 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 2
• Uart: 6
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 312
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.65 to 1.95
• Fpu: No
• Mpu / Mmu: No / Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

462
AT91SAM9XE128/256/512 Preliminary
Figure 33-18. TWI Read Operation with Single Data Byte without Internal Address
(CLDIV, CHDIV, CKDIV) in TWI_CWGR
Read Receive Holding Register
Set the Master Mode register:
TWI_CR = MSEN + SVDIS
TWI_CR = START | STOP
Read ==> bit MREAD = 1
Set the Control register:
- Device slave address
- Transfer direction bit
Read Status register
Read status register
(Needed only once)
Start the transfer
- Master enable
Yes
TXCOMP = 1?
Yes
Set TWI clock
RXRDY = 1?
BEGIN
END
No
No
6254C–ATARM–22-Jan-10