SAM3U2E Atmel Corporation, SAM3U2E Datasheet - Page 629
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SAM3U2E
Manufacturer Part Number
SAM3U2E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U2E
Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
96 MHz
Cpu
Cortex-M3
# Of Touch Channels
57
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
5
Twi (i2c)
2
Uart
5
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
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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