AT91SAM9G10-EK Atmel, AT91SAM9G10-EK Datasheet - Page 215

• Manufacturer Part Number: AT91SAM9G10-EK
• Description: KIT DEV FOR SAM9G10 ARM
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT91SAM9G10-EK

• Contents: Board, Cables, Power Supply
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Mcu Supported Families: AT91SAM9G10, ARM926EJ-S
• Tool / Board Applications: Microcontroller
• Rohs Compliant: Yes
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

23.6.2
Name:
Address:
Access:
Reset:
• COUNT: SDRAMC Refresh Timer Count
This 12-bit field is loaded into a timer that generates the refresh pulse. Each time the refresh pulse is generated, a refresh
burst is initiated. The value to be loaded depends on the SDRAMC clock frequency (MCK: Master Clock), the refresh rate
of the SDRAM device and the refresh burst length where 15.6 µs per row is a typical value for a burst of length one.
To refresh the SDRAM device, this 12-bit field must be written. If this condition is not satisfied, no refresh command is
issued and no refresh of the SDRAM device is carried out.
6462A–ATARM–03-Jun-09
31
23
15
–
–
–
7
SDRAMC Refresh Timer Register
30
22
14
SDRAMC_TR
0xFFFFEA04
Read-write
0x00000000
–
–
–
6
29
21
13
–
–
–
5
28
20
12
–
–
–
4
COUNT
27
19
11
–
–
3
26
18
10
–
–
2
COUNT
AT91SAM9G10
25
17
–
–
9
1
24
16
–
–
8
0
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