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參數(shù)資料
| 型號(hào)： | GT-48006A |
| 廠商： | Galileo Technology Services, LLC |
| 英文描述： | Low Cost Two Port 10/100Mbps Ethernet Bridge/Switch Controller(低成本、雙端口10/100Mbps以太網(wǎng)橋式/交換式控制器) |
| 中文描述： | 低成本雙口10/100Mbps以太網(wǎng)橋/開關(guān)控制器（低成本，雙端口10/100以太網(wǎng)橋式/交換式控制器） |
| 文件頁數(shù)： | 31/33頁 |
| 文件大?。?/td> | 352K |
| 代理商： | GT-48006A |
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GT-48006A Low Cost Two Port 10/100 Ethernet Bridge/Switch Controller
7
4.
RESET Configuration
The GT-48006A uses several pins as configuration inputs to set certain parameters following a RESET. The definition
of the configuration pins changes immediately after RESET to their usual function.
4.1
Configuration Pins
Configuration pins must be pulled up or down externally at RESET to select the desired operational parameter. The
recommended value of the pull-up/down resistors is 4.7K ohms. Table 1 on page 7 shows the configuration pins for GT-
48006A.
1. This setting was listed incorrectly in previous revisions of this document. Please check your design and ensure that you
have the proper pin strapping option for auto negotiation.
Table 1: RESET Pin Strapping Options
Pin
Co nf igu rat ion Fu nct i on
DAddr[1:0]
0-
1-
Auto Negotiation Enable for port 1 and 01
Enable
Disable
DAddr[2]
Skip Init
0-
1-
Skip Initialization on RESET
Don’t skip initialization
DAddr[3]
Limit4
0-
1-
Disable (standard backoff)
Enable
DAddr[4]
VL Tag enable
0-
1-
Enable - Pass up to 1522 bytes packets
Disable - Pass up to 1518 bytes packets
DAddr[5]
DRAM Size
0-
1-
2Mbyte
1Mbyte
DAddr[6]
Half/Full Duplex Mode for Port 0
0-
1-
Half Duplex
Full Duplex
DAddr[7]
Half/Full Duplex Mode for Port 1
0-
1-
Half Duplex
Full Duplex
DAddr[8]
Backpressure
0-
1-
Disable
Enable
LEDStb
Force Link Pass
0-
1-
Force Link Status to “l(fā)ink is up”
Read Link Status from the PHY via SMI
LEDData
Disable Buffer Threshold
0-
1-
Fixed buffer allocation
Dynamic buffer allocation
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