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參數(shù)資料
| 型號： | USB97C223 |
| 廠商： | SMSC Corporation |
| 英文描述： | capacitor Selection for Internal Regulator Output Pins |
| 中文描述： | 電容的選擇內部穩(wěn)壓器輸出引腳 |
| 文件頁數(shù)： | 41/59頁 |
| 文件大小： | 385K |
| 代理商： | USB97C223 |
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SMSC DS – USB97C201
Page 41
Rev. 03/25/2002
PRELIMINARY
IDE_TIM
(0xDF - RESET=0x00)
BIT
2
IDE TIMING REGISTER
DESCRIPTION
NAME
PPE
R/W
R/W
Prefetch and Posting Enable.
1:Prefetch and posting to the IDE data port is enabled for the
drive.
0: Prefetch and posting is disabled for the drive .
IORDY Sample Point Enable.
1: All accesses to the ATA I/O address range sample IORDY.
The IORDY sample point is specified by the “IORDY Sample
Point” field of this register.
0: IORDY sampling is disabled. The internal IORDY signal is
forced asserted guaranteeing that IORDY is sampled asserted
at the first sample point as specified by the “IORDY Sample
Point” field in this register.
Fast Timing Bank.
1: Accesses to the data port of the ATA IO address range
uses fast timings. PIO accesses to the data port use fast
timing only if bit 3 of this register is zero. Accesses to all non-
data ports of the ATA I/O address range always use the 8 bit
compatible timings.
0: Accesses to the data port of the ATA I/O address range
uses the 16 bit compatible timing.
1
ISPE
R/W
0
FTB
R/W
Note:
the following settings should be used for the ISP, RT, DTE, and FTB bits for the various PIO and MWDMA
modes:
MODE
ISP[1:0]
00
01
10
00
10
10
RT[1:0]
11
11
11
00
10
11
FTB
1
1
1
0
1
1
DTE
0
0
0
x
x
x
COMMENT
PIO Mode 0
PIO Mode 1
PIO Mode 2-4
MWDMA 0
MWDMA 1
MWDMA 2
ATA PIO cycle speed limited by 8051 data moves
ATA PIO cycle speed limited by 8051 data moves
ATA PIO cycle speed limited by 8051 data moves
requires compatibility mode timing to be used
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| USB97C223-NE | 制造商:SMSC 制造商全稱:SMSC 功能描述:Bus Powered USB 2.0 Flash Media Controller |
| USB97C223-NU | 制造商:SMSC 制造商全稱:SMSC 功能描述:Bus Powered USB 2.0 Flash Media Controller |
| USB97C242 | 制造商:SMSC 制造商全稱:SMSC 功能描述:USB 2.0 Flash Drive Controller |
| USB97C242-MN | 制造商:SMSC 制造商全稱:SMSC 功能描述:USB 2.0 Flash Drive Controller |
| USB97C242-MN-03 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:SMSC 功能描述: |
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