SAM3U2C Atmel Corporation, SAM3U2C Datasheet - Page 629

• Manufacturer Part Number: SAM3U2C
• Manufacturer: Atmel Corporation

Specifications of SAM3U2C

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 96 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 28
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 57
• Ext Interrupts: 57
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 4
• Twi (i2c): 1
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 36
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

33.5
33.5.1
Table 33-3.
33.6
33.6.1
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
Pin Name
TWD
TWCK
Application Block Diagram
Product Dependencies
I/O Lines Description
I/O Lines
I/O Lines Description
Figure 33-2. Application Block Diagram
Both 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.
TWD and TWCK pins may be multiplexed with PIO lines. To enable the TWI, the programmer
must perform the following step:
The user must not program TWD and TWCK as open-drain. It is already done by the hardware.
Table 33-4.
• Program the PIO controller to dedicate TWD and TWCK as peripheral lines.
Rp: Pull up value as given by the I²C Standard
Host with
Interface
Instance
TWI
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
TWI0
TWI0
TWI1
TWI1
TWD
TWCK
I/O Lines
Serial EEPROM
Atmel TWI
Slave 1
Figure 33-2 on page
TWCK0
TWCK1
Signal
TWD0
TWD1
I²C RTC
Slave 2
Controller
I²C LCD
Slave 3
629). When the bus is free, both lines are
I/O Line
PA10
PA25
PA24
PA9
I²C Temp.
Sensor
Slave 4
SAM3U Series
SAM3U Series
Rp
Peripheral
Input/Output
Input/Output
Type
A
A
A
A
Rp
VDD
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