SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 768

• 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

41.4.4
768
AT91SAM9G20
I/O Slew Rates
The IOSR and VDDIOMSEL bits in the EBI_CSA register allow the user to program the rising
and falling times of SDRAM signals. Rising/Falling time is given between 30% and 70%.
Table 41-8.
Table 41-9.
VDDIOMSEL
VDDIOMSEL
0
0
1
1
0
0
1
1
SDRAM Clock
SDRAM Data, Address and Control
IOSR
IOSR
0
1
0
1
0
1
0
1
1.8V range, FAST slew rate,
C
1.8V range, SLOW slew rate,
C
3.3V range, FAST slew rate,
C
C
1.8V range, FAST slew rate,
C
1.8V range, SLOW slew rate,
C
3.3V range, FAST slew rate,
C
C
Conditions
3.3V range, SLOW slew rate,
Conditions
3.3V range, SLOW slew rate,
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
= 10 pF
= 10 pF
= 10 pF
= 30 pF
= 30 pF
= 50 pF
= 50 pF
= 10 pF
Rising time
Rising time
(ns)
(ns)
0.8
1.6
0.8
1.5
1.5
1.7
2.8
6.0
6384E–ATARM–05-Feb-10
Falling time
Falling time
(ns)
(ns)
1.0
1.5
0.8
1.6
1.5
1.8
3.1
5.7