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參數(shù)資料
| 型號(hào)： | AM79C875KI |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類(lèi)： | 網(wǎng)絡(luò)接口 |
| 英文描述： | NetPHY⑩ 4LP Low Power Quad 10/100-TX/FX Ethernet Transceiver |
| 中文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP100 |
| 封裝： | 14 X 20 MM, PLASTIC, QFP-100 |
| 文件頁(yè)數(shù)： | 47/48頁(yè) |
| 文件大?。?/td> | 2480K |
| 代理商： | AM79C875KI |
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Am79C875
47
B4.5) Full Duplex operation with Auto-Negotiation Disabled
SYMPTOM:
If Auto-Negotiation is disabled, the device cannot be pin-strapped to full-duplex. LEDDPX[2]/
DPLX (Pin 41) should set the duplex at reset if LEDACT_LINK/ANEGA (Pin 39) is LOW at re-
set. Instead, all 4 ports are half-duplex regardless of the setting of Pin 41.
IMPLICATION:
This is a minor issue which should not affect normal operation. Auto-Negotiation operation is
usually set by default in systems today so that both link partners can operate at the highest set-
ting (speed and duplex). Very rarely do systems rely on Parallel Detect to set the speed of the
link. Note that RMII operation is by definition, full-duplex.
WORKAROUND:
Full-duplex operation must be set through management pins, Register 0, bit 8.
STATUS:
This errata will not be fixed.
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