AT32UC3B1256 Atmel Corporation, AT32UC3B1256 Datasheet - Page 230

• Manufacturer Part Number: AT32UC3B1256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3B1256

• Flash (kbytes): 256 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 60 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Operating Voltage (vcc): 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 10
• Output Compare Channels: 16
• Input Capture Channels: 6
• Pwm Channels: 13
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Figure 19-16. TWI Write Operation with Multiple Data Bytes with or without Internal Address
32059L–AVR32–01/2012
TWI_THR = data to send
Yes
(CLDIV, CHDIV, CKDIV) in TWI_CWGR
- Internal address size
Set the Master Mode register:
TWI_CR = MSEN + SVDIS
Internal address size = 0?
Write ==> bit MREAD = 0
TWI_THR = Data to send
Set the Control register:
- Device slave address
Load Transmit register
- Transfer direction bit
Read Status register
Read Status register
(Needed only once)
- Master enable
TXCOMP = 1?
Yes
Data to send?
Yes
Set TWI clock
TXRDY = 1?
Yes
BEGIN
END
(if IADR used)
No
No
No
Set the internal address
TWI_IADR = address
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