參數(shù)資料
型號(hào)： RTL8019AS
廠商： Electronic Theatre Controls, Inc.
英文描述： Realtek Full-Duplex Ethernet Controller with Plug and Play Function (RealPNP)
中文描述： 瑞昱全雙工以太網(wǎng)控制器即插即用功能（RealPNP）
文件頁(yè)數(shù)： 36/50頁(yè)
文件大?。?/td> 992K
代理商： RTL8019AS
8019AS.doc
2001-05-10
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SPECIFICATION
RTL8019AS
36
Card resource data is read by first polling the Status register and waiting for bit[0] to be set. When
this bit is set it means that one byte of resource data is ready to be read from the Resource Data
register. After the Resource Data register is read, the Status register must be polled before reading
the next byte of resource data. This process is repeated until all resource data is read. The format of
resource data is described in the following section.
The above operation implies that the hardware is responsible for accumulating 8 bits of data in the
Resource Data register. When this operation is complete, the status bit[0] is set. When a read is
performed on the Resource Data register, the status bit[0] is cleared, eight more bits are shifted
into the Resource Data register, then the status bit[0] is set again.
6.2.5. PnP auto detect mode
When using RTL8019, the user needs to setup the card to PnP or jumperless mode according to
the host environments. The typical operating modes of a RTL8019 card include:
(1) when used in a non-PnP PC, set the card to RT jumperless mode & power-on active
(2) when used in a PnP PC,
(2.1) if BROM disabled, set the card to PnP mode & power-on inactive
(2.2) if BROM enabled, set the card to PnP mode & power-on active
P.S. PCs with PnP BIOS, or Windows 95, or Intel Configuration Manager, etc. are called PnP PCs
If a card in mode(2.1) is put in a non-PnP PC, the drivers will fail to initialize the card.
RTL8019AS supports a PnP auto-detect mode to solve the problem.
The card may be set to a
default state: PnP mode & power-on active with BROM disabled.
If the card is in a non-PnP PC,
it will work like a normal jumperless card. If the card is in a PnP PC which requires the card to be
power-on inactive, RTL8019AS will change itself into inactive state when the first time a PnP init
key is detected.
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