AT32UC3A0128 Atmel Corporation, AT32UC3A0128 Datasheet - Page 252

• Manufacturer Part Number: AT32UC3A0128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A0128

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 109
• Ext Interrupts: 109
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 1
• Uart: 4
• Ssc: 1
• Ethernet: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 16
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• 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

32058K AVR32-01/12
24.14.7
Name:
Access:
Reset Value: 0x0000F009
• TXCOMP: Transmission Completed (automatically set / reset)
TXCOMP used in Master mode:
0 = During the length of the current frame.
1 = When both holding and shifter registers are empty and STOP condition has been sent.
TXCOMP behavior in Master mode can be seen in
TXCOMP used in Slave mode:
0 = As soon as a Start is detected.
1 = After a Stop or a Repeated Start + an address different from SADR is detected.
TXCOMP behavior in Slave mode can be seen in
page 244
• RXRDY: Receive Holding Register Ready (automatically set / reset)
0 = No character has been received since the last RHR read operation.
1 = A byte has been received in the RHR since the last read.
RXRDY behavior in Master mode can be seen in
RXRDY behavior in Slave mode can be seen in
page 244
• TXRDY: Transmit Holding Register Ready (automatically set / reset)
TXRDY used in Master mode:
0 = The transmit holding register has not been transferred into shift register. Set to 0 when writing into THR register.
1 = As soon as a data byte is transferred from THR to internal shifter or if a NACK error is detected, TXRDY is set at the
same time as TXCOMP and NACK. TXRDY is also set when MSEN is set (enable TWI).
TXRDY behavior in Master mode can be seen in
TXBUFE
31
23
15
–
–
7
–
and
and
TWI Status Register
SR
Read-only
Figure 24-29 on page
Figure 24-29 on page
RXBUFF
OVRE
30
22
14
–
–
6
ENDTX
GACC
244.
244.
29
21
13
–
–
5
Figure 24-8 on page
Figure 24-10 on page
Figure 24-24 on page
ENDRX
SVACC
Figure 24-26 on page
Figure 24-8 on page 225
28
20
12
–
–
4
EOSACC
SVREAD
27
19
11
–
–
3
225.
226.
241,
242,
and in
Figure 24-27 on page
Figure 24-27 on page
SCLWS
TXRDY
26
18
10
–
–
2
Figure 24-10 on page
ARBLST
RXRDY
25
17
–
–
9
1
243,
243,
AT32UC3A
226.
Figure 24-28 on
Figure 24-28 on
TXCOMP
NACK
24
16
–
–
8
0
252