SAM3U2C Atmel Corporation, SAM3U2C Datasheet - Page 629
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SAM3U2C
Manufacturer Part Number
SAM3U2C
Description
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
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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
629
629
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