參數(shù)資料
型號: MQ80C52CXXX-30/883D
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 30 MHz, MICROCONTROLLER, CQFP44
封裝: CERAMIC, QFP-44
文件頁數(shù): 75/80頁
文件大?。?/td> 5152K
代理商: MQ80C52CXXX-30/883D
275
XMEGA A [MANUAL]
8077I–AVR–11/2012
24.9.5 SDRAMCTRLB – SDRAM Control register B
Bit 7:6 – MRDLY[1:0]: SDRAM Mode Register Delay
These bits select the delay between a LOAD MODE command and an ACTIVE command, in number of ClkPER2 cycles,
according to Table 24-14.
Table 24-14. SDRAM Load Mode to Active command delays settings.
Bit 5:3 – ROWCYCDLY[2:0]: SDRAM Row Cycle Delay
These bits select the delay between a REFRESH and an ACTIVE command in number of ClkPER2 cycles, according to
Table 24-15. SDRAM Row cycle delay settings.
Bit 2:0 – RPDLY[2:0]: SDRAM Row to Precharge Delay
RPDLY defines the delay between an Active command and a Precharge command in number of ClkPER2 cycles,
according to Table 24-16.
Bit
765
4
3
2
1
0
+0x08
MRDLY[1:0]
ROWCYCDLY[2:0]
RPDLY[2:0]
Read/Write
R/W
Initial Value
0
MRDLY[1:0]
Group configuration
Description
00
0CLK
Zero ClkPER2 cycles delay
01
1CLK
One ClkPER2 cycles delay
10
2CLK
Two ClkPER2 cycles delay
11
3CLK
Three ClkPER2 cycles delay
ROWCYDLY[2:0]
Group Configuration
Description
000
0CLK
Zero ClkPER2 cycles delay
001
1CLK
One ClkPER2 cycles delay
010
2CLK
Two ClkPER2 cycles delay
011
3CLK
Three ClkPER2 cycles delay
100
4CLK
Four ClkPER2 cycles delay
101
5CLK
Five ClkPER2 cycles delay
110
6CLK
Six ClkPER2 cycles delay
111
7CLK
seven ClkPER2 cycles delay
相關PDF資料
PDF描述
MR83C154XXX-25P883 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44
MS80C51-12D 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44
MT80C51T-16R 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
MD80C32E-20SC 8-BIT, 20 MHz, MICROCONTROLLER, CDIP40
MC80C52XXX-16SHXXX 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CDIP40
相關代理商/技術參數(shù)
參數(shù)描述
MQ82370-20 制造商:Rochester Electronics LLC 功能描述:- Bulk
MQ8238020 制造商:Intel 功能描述:CONTROLLER: OTHER
MQ82380-20 制造商:Rochester Electronics LLC 功能描述:- Bulk
MQ82380-20/R 制造商:Rochester Electronics LLC 功能描述:
MQ82592 制造商:Rochester Electronics LLC 功能描述:- Bulk