AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 239

• Manufacturer Part Number: AT91SAM9G45-CU-999
• Description: IC MCU ARM9 APMC 324TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9G45-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 400MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: ROM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 1.1 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 324-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

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
239