AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 239

• Manufacturer Part Number: AT91SAM9G45-EKES
• Description: KIT EVAL FOR AT91SAM9G45
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM9G45-EKES

• Contents: Board
• Processor To Be Evaluated: SAM9G45
• Data Bus Width: 32 bit
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 50 C
• Minimum Operating Temperature: - 10 C
• Operating Supply Voltage: 1.8 V to 3.3 V
• For Use With/related Products: AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4626953

Figure 22-6. Burst Write Access, Row Closed, DDR2-SDRAM Device
Figure 22-7. Burst Write Access, Row Closed, SDR-SDRAM Device
6438F–ATARM–21-Jun-10
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]
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 22-8 on page
Dg Dhs
0
De
Df
BST
AT91SAM9G45
Dg
Dh
F
NOP
240.
3
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