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參數資料
型號: W83759A
廠商: WINBOND ELECTRONICS CORP
英文描述: ADVANCED VL-IDE DISK CONTROLLER
中文描述: 先進的VL - IDE磁盤控制器
文件頁數: 13/41頁
文件大小: 334K
代理商: W83759A
W83759A
Publication Release Date: May 1995
- 13 -
Revision A1
Continued
when ADV_P
= 1
IDEN1 IDEN0 Primary IDE Secondary IDE
0 0 disabled disabled
1 0 disabled enabled
0 1 enabled disabled
1 1 enabled enabled
CRX81h (POSP1)
Read / Write
Power-on Setting Programming 1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ADV_P
SP1_P
MD1_P
MD0_P
PRDYEN_P
SRDYEN_P
IDEN1_P
IDEN0_P
After power-on, the content of the POSP1 register is equal to that of the POSS1 register. The host
can program POSP1 to modify the power-on settings.
Bit 7
ADV_P
Programming application mode
0 No advanced mode application
1 Advanced mode application
Bit 6
SP1_P
Select VESA bus operating CLK
0 VLCLK 33 MHz
1 VLCLK > 33 MHz
Bit 5, 4
MD1_P,
MD0_P
Select default HDD host transfer mode
MD1_P MD0_P
0 0 Mode 0 (cycle time = 600 nS)
0 1 Mode 0+ (cycle time = 500 nS)
1 0 Mode 1 (cycle time = 400 nS)
1 1 Mode 2 (cycle time = 240 nS)
Bit 3
PRDYEN_P
Primary channel IOCHRDY flow control
0 Disable IOCHRDY flow control
1 Enable IOCHRDY flow control
Bit 2
SRDYEN_P
Secondary channel IOCHRDY flow control
0 Disable IOCHRDY flow control
1 Enable IOCHRDY flow control
Bit 1, 0
IDEN1_P,
IDEN0_P
IDE ENable control
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