SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 759

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

Specifications of SAM9G20

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 7
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 95
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

38.5
38.5.1
Table 38-3.
38.6
38.6.1
38.6.2
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
Pin Name
TWD
TWCK
Application Block Diagram
Product Dependencies
I/O Lines Description
I/O Lines
Power Management
I/O Lines Description
Figure 38-2. 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.
The TWI interface may be clocked through the Power Management Controller (PMC), thus the
programmer must first configure the PMC to enable the TWI clock.
• Program the PIO controller to dedicate TWD and TWCK as peripheral lines.
• Enable the peripheral clock.
Rp: Pull up value as given by the I²C Standard
Host with
Interface
TWI
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
TWD
TWCK
Serial EEPROM
Atmel TWI
Slave 1
Figure 38-2 on page
I²C RTC
Slave 2
Controller
I²C LCD
Slave 3
759). When the bus is free, both lines are
I²C Temp.
Sensor
Slave 4
Rp
Input/Output
Input/Output
SAM9G35
SAM9G35
Type
Rp
VDD
759
759