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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） |
| 文件頁數(shù)： | 20/50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
20
CONFIG2: RTL8019AS Configuration Register 2 (05H; Type=R except Bit[7:5]=R/W)
Bit
Symbol
7-6
PL1-0
Select network medium types.
PL1
PL0
0
0
Description
Medium Type
TP/CX auto-detect
(10BaseT link test is
enabled)
10BaseT with link test
disabled
10Base5
10Base2
0
1
1
1
0
1
5
BSELB
This bit, when set, forces the BROM disabled regardless of the contents of BS4-0. Its
power-up initial value is 0 and can be modified by software if EEM1=EEM0=1 in
9346CR register.
4-0
BS4-0
These bits select the BROM size & memory base address.
BS4 BS3 BS2 BS1 BS0
0
0
*
0
0
0
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
The RTL8019AS supports a special BROM mode: page mode. In page mode, the
BROM always occupies 16K-byte host memory space. However the actual BROM size
can be up to 4M bytes.
The BROM is divided into several 16K-byte pages. The power on boot page is set to
page 0 and the program in page 0 is responsible to select the other pages by the
BPAGE register and load their programs.
In page mode, bits BP7-0 of BPAGE register are mapped to the BA21-14 pins to select
the proper BROM page. In other modes, BA21-16 are not used and the BA15-14
outputs are shown in the following table.
BROM Base & size
Disabled
C000h, 32K
C800h, 32K
D000h, 32K
D800h, 32K
C000h, 64K
D000h, 64K
C000h, 16K
C400h, 16K
C800h, 16K
CC00h, 16K
D000h, 16K
D400h, 16K
D800h, 16K
DC00h, 16K
C000h, Page
C400h, Page
C800h, Page
CC00h, Page
D000h, Page
D400h, Page
D800h, Page
DC00h, Page
*
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
*
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
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