Adaptec 1737100 Programmer Manual - Page 15
Introduction
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UPC - 760884136362
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1 w w w w Introduction The Adaptec AIC-6915, PCI 10/100 Ethernet LAN Controller provides advanced Ethernet adapter features in a single chip optimized for high-performance and cost effective Ethernet NICs (Network Interface Cards). The AIC-6915 integrates all the functions necessary for an Ethernet PCI adapter to directly connect (via a Medium Independent Interface (MII) -based PHY and line transformer) to Category 5 unshielded twisted pair (UTP) or shielded twisted pair (STP). The AIC-6915 integrates the following main blocks: s Full-featured 2.1 PCI compliant, 32/64-bit master and 32-bit slave bus interface s Powerful DMA engine s 802.3 compliant 10/100 MAC (Medium Access Control) module s MII Module s 100BASE-TX compliant PCS (Physical Signaling) and PMA (Physical Medium Attachment) modules The PCI Master uses enhanced data transfer commands to transfer data in zero wait state bursts. It supports 32- or 64-bit addressing for host buffers and transfers data at up to the maximum burst rate of 133/266 MBytes/sec with a maximum burst size of up to 2 KBytes. The AIC-6915 provides an External Interface port for access to a ROM/EEPROM (for add-in card local BIOS support, or boot ROM) and general purpose registers. A separate 4-wire Serial EEPROM port allows for downloading configuration information such as the Device ID, Vendor ID, Subsystem ID, Subsystem Device ID and Interrupt line. The AIC-6915 supports VLAN tagging, IEEE 802.1q and Flow Control as defined by the IEEE 802.3x specification. The AIC-6915 also provides an MII. Throughout this document data sizes are defined as follows: s Byte = 8-bits s Halfword = 16-bits s Word = 32-bits s Doubleword = 64-bits 1-1
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