參數(shù)資料
型號(hào)： AX88780
廠商： ASIX Electronics Corporation
英文描述： High-Performance Non-PCI Single-Chip 32-bit 10/100M Fast Ethernet Controller
中文描述： 高性能非PCI單芯片32位10/100M自適應(yīng)快速以太網(wǎng)控制器
文件頁(yè)數(shù)： 14/49頁(yè)
文件大?。?/td> 687K
代理商： AX88780
AX88780
3.10 16-bit Mode
AX88780 supports 16-bit mode operation. AX88780 will request a 16K bytes space for TX, RX and register access. The
mapping mechanism can refer to below block. Firstly, the driver requests a 16K bytes space from system then sets the new
mapped address to base + 6 to remap window base. Secondly, driver sets base address to ‘1’ to start decoding.
MEMBASE--Memory base Address
Field
Name
Type
Default
15:1
-
R/W
All 0’s
Reserved.
0
DECODE_EN
R/W
0
16-bit decode enable
Set to ‘1’ to start decoding.
Description
MEMBAS6--Memory base Address + 6
Field
Name
Type
15:8
-
R/W
7:0
WINSIZE R/W
Default
8’h00
8’h00
Description
Reserved.
Window Base Pointer. (MSB only)
This field defines another new windows base address for TX, RX and register
access. The total size is 8K bytes.
TX areas occupy 4K – 256 bytes
Registers occupy 256 bytes.
RX areas occupy 4K bytes.
Note: This address defines the window used in TX, RX and registers accessed in 16-bit mode. Refer to below mapping
mechanism.
B a s e a d d r e s s
B a s e a d d r e s s + 6
X X
N e w b a s e A d d r e s s = 1 6 ’ h X X 0 0
T X a r e a
3 8 4 0 b y t e s
R e g i s t e r a r e a
2 5 6 b y t e s
R x a r e a
4 0 9 6 b y t e s
4 K b y t e s
4 K b y t e s
8 K b y t e s
1 6 K b y t e s
1 5
0
Figure 5 : 16-bit mode map block
Next example is to explain the address translation. If the starting address 24’h20_0000 is allocated to hardware then
driver sets 16’h1000 to address 24’h20_0006. The new base address will be 24’h20_1000 now. The TX areas will be
from 24’20_1000 to 24’h20_1EFF. The registers range will be from 24h20_1F00 to 24’h20_1FFF. The RX areas will be
from 24’h20_2000 to 24’h20_2FFF.
3.11 EEPROM Format
AX88780 will auto-load data from EEPROM device after hardware reset. If the EEPROM device is not attached, the
loading operation will be discarded. The EEPROM mainly provides MAC address information and CIS information if it is
used in PCMCIA environment. Below table is the format if EEPROM device is employed. Note: If the address of MAC is
48’h123456789ABC then the MACID0 will be 16’h9ABC, MACID1=16h’h5678 and MACID2=16’h1234.
14
ASIX ELECTRONICS CORPORATION
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AX88780_07 制造商:ASIX 制造商全稱:ASIX 功能描述:High-Performance Non-PCI Single-Chip 32-bit 10/100M Fast Ethernet Controller
AX88782 制造商:ASIX 制造商全稱:ASIX 功能描述:ASIX Multi-Port Ethernet Controller
AX88783 制造商:ASIX 制造商全稱:ASIX 功能描述:ASIX Multi-Port Ethernet Controller
AX88790L 制造商:ASIX 制造商全稱:ASIX 功能描述:10/100BASE 3-in-1 PCMCIA Fast Ethernet Controller
AX88796 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-in-1 Local Bus Fast Ethernet Controller
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