SAM9G25 Atmel Corporation, SAM9G25 Datasheet - Page 442

• Manufacturer Part Number: SAM9G25
• Manufacturer: Atmel Corporation

Specifications of SAM9G25

• Flash (kbytes): 0 Kbytes
• Pin Count: 247
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 7
• Lin: 4
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: DDR2/LPDDR, SDRAM/LPSDR
• 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
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Figure 30-6. Burst Write Access, Row Closed, DDR2-SDRAM Device
Figure 30-7. Burst Write Access, Row Closed, SDR-SDRAM Device
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COMMAND
COMMAND
DQS[1:0]
DM[1:0]
D [15:0]
DM[3:0]
SDCLK
SDCLK
BA[1:0]
A[12:0]
A[12:0]
BA[1:0]
D[31:0]
SAM9G25
SAM9G25
0
NOP
0
F
3
NOP
PRCHG
A write command can be followed by a read command. To avoid breaking the current write
burst, Twtr/Twrd (bl/2 + 2 = 6 cycles) should be met. See
Trp = 2
PRCHG
Row a
NOP
Trp
Row a
ACT
NOP
Trcd = 2
NOP
ACT
col a
WRITE
Trcd
NOP
Col a
Da
NOP
Da Db
WRITE
Dc Dd
0
Db
De Df
Dc
NOP
Dd
Figure 30-8 on page
Dg Dhs
0
De
Df
BST
Dg
Dh
F
11032A–ATARM–27-Jul-11
11032A–ATARM–27-Jul-11
NOP
443.
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