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參數資料
型號: W90221F
廠商: WINBOND ELECTRONICS CORP
英文描述: PA-RISC Embedded Micro-Controller(惠普PA-RISC結構的32位嵌入式微控制器)
中文描述: PA - RISC的嵌入式微控制器(惠普的PA - RISC結構的32位嵌入式微控制器)
文件頁數: 49/174頁
文件大小: 2102K
代理商: W90221F
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The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed, distributed or reproduced without permission from Winbond.
49
Versi on 0. 4, March/2000
DRAM Bank Base Address Register ( )
Index : 0x32h,0x36h
Read/Write
Power-on Default : --
0
1
2
3
4
5
6
7
Base Address of bank BASEaddr[0:7]
8
9
10
11
12
13
14
15
BASE addr[8:9]
Reserved
These 2 16-bit registers defines the
most significant 10 bits
of each DRAM banks' base (bottom) address.
The "DRAM base address" togather with the "DRAM size" (defined in DRAMconf0,1) construct the whole
address range of each DRAM banks.
The base address of all two DRAM banks have no default value after power-on reset. It is software's
responsibility to well program these registers before access system DRAM.
DRAM Control Register (DRAMctrl)
Index : 0x38h
Read/Write
Power-on Default : 0x0
0
1
2
3
4
5
6
7
DIMMbk DRAMtp ONsdram TESTRE
F
PREchrg
MRS
REF
PDen
8
9
10
11
12
13
14
15
DISAF
MCLK ctrl select
MCLK data select
Bit 0
Bit 1 DRAM type
0 = EDO
1 = SDRAM
Bit 2 On Board SDRAM
0 = DIMM
1 = On board
banks per DIMM
0 = 1 bank
1 = 2 banks
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