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參數(shù)資料
| 型號： | 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） |
| 文件頁數(shù)： | 24/50頁 |
| 文件大?。?/td> | 992K |
| 代理商： | RTL8019AS |
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8019AS.doc
2001-05-10
·R￥bééa￥÷|3--¤￥q
SPECIFICATION
RTL8019AS
24
5.2.1. Card Control Registers
Index
00H
Set RD_DATA port
Name
Type
W
Definition
The location of the READ_DATA port is determined by writing to
this register. Bits[7:0] become ISA I/O read port address bits[9:2].
Address bits[1:0] of the READ_DATA port are always 1.
A read to this register causes a PnP card in the
Isolation
state to
compare one bit of the card's serial ID. This process will be described
in more details in section 6.
Bit[0] - Reset command
Setting this bit will reset all logical devices and restore configuration
registers to their power-up values.
The CSN is preserved.
Bit[1] - Wait for Key command
Setting this bit makes the PnP card return to the
Wait for Key
state. The CSN is preserved.
Bit[2] - PnP Reset CSN command
Setting this bit will reset the card's CSN to 0.
Both the CSN (index 06H) and CSNSAV (index F5H) registers are
reset.
Note that the hardware will automatically clear the bits and there is
no need for software to clear them.
A write to this register will cause all cards that have a CSN that
matches the write data[7:0] to go from the
Sleep
state to either the
Isolation
state if the write data for this command is zero or the
Config
state if the write data is not zero.
A read from this register reads the next byte of resource data. The
Status register must be polled until bit[0] is set before this register
may be read.
Bit[0] when set indicates it is okay to read the next data byte from the
Resource Data register.
A write to this register sets a card's CSN. The CSN is a value
uniquely assigned to each ISA PnP card after the serial identification
process so that each card may be individually selected during a
Wake[CSN] command. The CSN value written to this register will
also be recorded to the CSNSAV register located at PnP register
index F5H and Group 1 Page3 offset 08H.
00H (Only one logical device in RTL8019AS).
01H
Serial Isolation
R
02H
Config Control
W
03H
Wake[CSN]
W
04H
Resource Data
R
05H
Status
R
06H
Card Select Number
(CSN)
R/W
07H
Logical Device
Number
R
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