ATAVRDISPLAYX Atmel, ATAVRDISPLAYX Datasheet - Page 281
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
ATAVRDISPLAYX
Manufacturer Part Number
ATAVRDISPLAYX
Description
KIT EVAL XMEGA DISPLAY
Manufacturer
Atmel
Specifications of ATAVRDISPLAYX
Main Purpose
*
Embedded
*
Utilized Ic / Part
*
Primary Attributes
*
Secondary Attributes
*
Silicon Manufacturer
Atmel
Silicon Family Name
ATxmega
Kit Contents
Board
Features
Temperature Sensor, Mono Speaker Via Audio Amplifier
Svhc
No SVHC (15-Dec-2010)
Core Architecture
AVR
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATAVRDISPLAYX
Manufacturer:
Atmel
Quantity:
135
- Current page: 281 of 445
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24.11.3
24.11.4
24.11.5
8077H–AVR–12/09
REFRESH - SDRAM Refresh Period Register
INITDLY - SDRAM Initialization Delay Register
SDRAMCTRLB - SDRAM Control Register B
• Bit 15:10 - Reserved
These bits are reserved and will always be read as zero.
• Bit 9:0 - REFRESH[9:0]: SDRAM Refresh Period
This register sets the refresh period as a number of Peripheral 2x clock (CLK
EBI is busy with another external memory access at time of refresh, up to 4 refresh will be
remembered and given at the first available time.
• Bit 15:14 - Reserved
These bits are reserved and will always be read as zero.
• Bit 13:0 - INITDLY[13:0]: SDRAM Initialization Delay
This register is used to delay the initialisation sequence after the controller is enabled until all
voltages are stabilized and the SDRAM clock has been running long enough to take the SDRAM
chip through its initialisation sequence. The initialisation sequence includes pre-charge all banks
to their idle state issuing an auto-refresh cycle and then loading the mode register. The setting in
this register is as a number of Peripheral 2x clock cycles.
Bit
+0x04
+0x05
Read/Write
Initial Value
Bit
+0x06
+0x07
Read/Write
Initial Value
Bit
+0x08
Read/Write
Initial Value
R/W
R/W
R/W
15
15
R
R
7
0
0
7
0
0
7
0
-
-
MRDLY[1:0]
R/W
R/W
R/W
14
14
R
R
6
0
0
6
0
0
6
0
-
-
R/W
R/W
R/W
R/W
13
13
R
5
0
5
0
0
5
0
0
-
ROWCYCDLY[2:0]
R/W
R/W
R/W
R/W
12
12
R
4
0
4
0
0
4
0
0
REFRESH[7:0]
-
INITDLY[7:0]
R/W
R/W
R/W
R/W
11
11
R
3
0
3
0
0
3
0
0
-
INITDLY[9:8]
R/W
R/W
R/W
R/W
10
10
R
2
0
2
0
0
2
0
0
-
RPDLY[2:0]
R/W
R/W
R/W
R/W
R/W
REFRESH[9:8]
1
0
1
9
0
0
1
9
0
0
R/W
R/W
R/W
R/W
R/W
0
0
0
8
0
0
0
8
0
0
XMEGA A
PER
) cycles. If the
SDRAMCTRLB
REFRESHL
REFRESHH
INITDLYL
INITDLYH
281
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