AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 250

• 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 22-22. Power-down Entry/Exit, Timeout = 0
22.4.4.3
Figure 22-23. Deep Power-down Mode Entry
250
COMMAND
DQS[1:0]
DM[1:0]
SDCLK
BA[1:0]
D[15:0]
A[12:0]
AT91SAM9G45
COMMAND
CKE
Deep Power-down Mode
DQS[1:0]
DM[1:0]
SDCLK
BA[1:0]
D[15:0]
A[12:0]
CKE
NOP READ
0
3
0
3
READ
The deep power-down mode is a new feature of the Low-power SDRAM. When this mode is
activated, all internal voltage generators inside the device are stopped and all data is lost.
This mode is activated by setting the low-power command bits [LPCB] to ‘11’. When this mode is
enabled, the DDRSDRC leaves normal mode (mode == 000) and the controller is frozen. To exit
deep power-down mode, the low-power bits (LPCB) must be set to “00”, an initialization
sequence must be generated by software. See
tialization” on page
BST
BST
NOP
NOP
Da
232.
Da
Db
Db
Entry power down mode
Section 22.3.2 “Low-power DDR1-SDRAM Ini-
PRCHG
NOP
Exit power down mode
Trp
DEEPOWER
READ
Enter Deep
Power-down
Mode
6438F–ATARM–21-Jun-10
NOP