AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 475

• Manufacturer Part Number: AT32UC3A3128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3128

• 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: 110
• Ext Interrupts: 110
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Sd / Emmc: 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): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 12
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

23.5
23.6
Table 23-4.
23.7
23.7.1
23.7.2
32072G–11/2011
Pin Name
TWD
TWCK
TWALM
Application Block Diagram
I/O Lines Description
Product Dependencies
I/O Lines
Power Management
I/O Lines Description
Figure 23-2. Application Block Diagram
In order to use this module, other parts of the system must be configured correctly, as described
below.
TWD and TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see
high. The output stages of devices connected to the bus must have an open-drain or open-col-
lector to perform the wired-AND function.
TWALM is used to implement the optional SMBus SMBALERT signal.
The TWALM, TWD, and TWCK pins may be multiplexed with I/O Controller lines. To enable the
TWIM, the user must perform the following steps:
If the CPU enters a sleep mode that disables clocks used by the TWIM, the TWIM will stop func-
tioning and resume operation after the system wakes up from sleep mode.
• Program the I/O Controller to:
Rp: pull-up value as given by the I2C Standard
Master
TWI
– Dedicate TWD, TWCK, and optionally TWALM as peripheral lines.
– Define TWD, TWCK, and optionally TWALM as open-drain.
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
SMBus SMBALERT
TWD
TWCK
TWALM
serial EEPROM
Atmel TWI
Slave 1
Figure 23-4 on page
I
Slave 2
2
C RTC
controller
I
Slave 3
2
C LCD
477). When the bus is free, both lines are
I
2
Slave 4
sensor
C temp
Rp
Rp
VDD
Rp
Input/Output
Input/Output
Input/Output
Type
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