AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 361

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

19.8.2
Register Name:
Access Type:
Offset:
Reset Value:
• COUNT[11:0]: Refresh Timer Count
9166C–AVR-08/11
31
23
15
7
-
-
-
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 (CLK_SDRAMC), the refresh rate of the SDRAM device and
the refresh burst length where 15.6µs 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.
Refresh Timer Register
30
22
14
6
-
-
-
TR
Read/Write
0x04
0x00000000
29
21
13
5
-
-
-
28
20
12
4
-
-
-
COUNT[7:0]
27
19
11
3
-
-
26
18
10
2
-
-
COUNT[11:8]
25
17
9
1
-
-
AT32UC3C
24
16
8
0
-
-
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