AT91SAM9G45-CU Atmel, AT91SAM9G45-CU Datasheet - Page 240

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

Specifications of AT91SAM9G45-CU

• 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
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 800 MHz
• Number Of Programmable I/os: 160
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Controller Family/series: AT91
• No. Of I/o's: 160
• Ram Memory Size: 64KB
• Cpu Speed: 400MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• For Use With: AT91SAM9G45-EKES - KIT EVAL FOR AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Figure 22-8. Write Command Followed By a Read Command without Burst Write Interrupt, Low-power DDR1-SDRAM
Figure 22-9. Single Write Access Followed By A Read Access Low-power DDR1-SDRAM Devices
240
COMMAND
DQS[1:0]
COMMAND
DM[1:0]
SDCLK
BA[1:0]
D[15:0]
A[12:0]
DQS[1:0]
DM[1:0]
SDCLK
BA[1:0]
D[15:0]
A[12:0]
AT91SAM9G45
Device
NOP
0
3
0
3
NOP
In the case of a single write access, write operation should be interrupted by a read access but
DM must be input 1 cycle prior to the read command to avoid writing invalid data. See
9 on page
PRCHG
col a
240.
Row a
NOP
WRITE
ACT
0
Da
Twrd = BL/2 +2 = 8/2 +2 = 6
NOP
Db
Dc
WRITE
Da
Dd De Df
NOP
col a
0
Dg Dh
NOP
3
col a
3
Db
Twr = 1
READ
READ
BST
BST
Data masked
Da Db
Da Db
NOP
6438F–ATARM–21-Jun-10
NOP
Figure 22-