參數(shù)資料
型號: W83977CTF-PW
英文描述: PERIPHERAL (MULTIFUNCTION) CONTROLLER
中文描述: 周邊(多功能)控制器
文件頁數(shù): 51/161頁
文件大?。?/td> 592K
代理商: W83977CTF-PW
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-42 -
Revision A1
2.2.8 Digital Input Register (DI Register) (Read base address + 7)
The Digital Input Register is an 8-bit read-only register used for diagnostic purposes. In a PC/XT or
AT only Bit 7 is checked by the BIOS. When the register is read, Bit 7 shows the complement
ofDSKCHG#
,
while other bits of the data bus remain in tri-state. Bit definitions are as follows:
x
x
Reserved for the hard disk controller
During a read of this register, these bits are in tri-state
DSKCHG
x
x
x
x
x
x
0
1
2
3
4
5
6
7
In the PS/2 mode, the bit definitions are as follows:
1
2
3
4
5
6
7
0
HIGH DENS#
DRATE0
DRATE1
DSKCHG
1
1
1
1
DSKCHG (Bit 7):
This bit indicates the complement of the DSKCHG# input.
Bit 6-3: These bits are always a logic 1 during a read.
DRATE1 DRATE0 (Bit 2, 1):
These two bits select the data rate of the FDC. Refer to the DR register bits 1 and 0 for the settings
corresponding to the individual data rates.
HIGHDENS#(Bit 0):
0 500 KB/S or 1 MB/S data rate (high density FDD)
1 250 KB/S or 300 KB/S data rate
相關(guān)PDF資料
PDF描述
W83977TF(EOL) W83877TF plus KBC. CIR. RTC
W83C42 KEYBOARD CONTROLLER
W83C42P KEYBOARD CONTROLLER
W83C45 Keyboard Controller
W83C45P Keyboard Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W83977EF 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND ISA I/O
W83977EF-AW 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND ISA I/O
W83977EF-PW 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83977EG 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND ISA I/O
W83977EG-AW 功能描述:IC I/O CONTROLLER 128-PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 專用 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 應(yīng)用:PDA,便攜式音頻/視頻,智能電話 接口:I²C,2 線串口 電源電壓:1.65 V ~ 3.6 V 封裝/外殼:24-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-QFN 裸露焊盤(4x4) 包裝:帶卷 (TR) 安裝類型:表面貼裝 產(chǎn)品目錄頁面:1015 (CN2011-ZH PDF) 其它名稱:296-25223-2