Adaptec 1737100 Programmer Manual - Page 20
Modules
![]() |
UPC - 760884136362
View all Adaptec 1737100 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 20 highlights
AIC-6915 Ethernet LAN Controller Programmer's Manual Modules The AIC-6915 contains the following major modules: s PCI - Controls access to the PCI bus and contains PCI-specific registers. s BusAccessControl - Arbitrates master accesses to the PCI bus from internal modules, and accesses the FIFO from the PCI side. s SlaveAccess - Drives the REGBUS to access the internal modules when AIC-6915 is accessed from the PCI bus. s General Registers - Contains general control and status registers, timers, and interrupt control. These registers are located throughout the AIC-6915. s Memory Port - Controls accesses to external EEPROM, FLASH, or other devices. s Serial EPROM - Controls interface to the serial EPROM. s TxDMA - Manages reading of the current frame being DMA-transferred for transmit, as well as transmit descriptor lists. s TxFrame - Manages the current frame being transmitted, reading the frame from the FIFO. s RxDMA - Manages writing of the current frame being DMA-transferred for receive, as well as the receive descriptor lists. s RxFrame - Manages the current frame being received, writing the frame to the FIFO. s Station Address - Compares the address of incoming frames with the stored addresses and/or hash table bits, and signals the RxFrame module if the addresses do not match. s TCP Checksum - Two TCP checksum modules are implemented, one for receive and one for transmit. The Receive TCP checksum module sums all relevant fields and compares them with the checksum value in the frame. The Transmit TCP checksum computes the checksum and places it in the FIFO. s Wakeup - Looks for frames matching a predefined pattern and asserts the PME_ signal to wake up the system if one is found. s Completion - Records the current address for writing completion descriptors and stores the upper 32-bits of the descriptor's address. s Statistics - Counts various events from MAC, receive, and transmit. s Synchronizer - Synchronizes receive data and control to the transmit clock. s MAC - The MAC layer defined in the Ethernet specification manages many of the details in transmitting and receiving frames. s 8 KByte SRAM - Dual-port SRAM used for storing transmit and receive data. Ì 1-6
![](/manual_guide/products/adaptec-1737100-programmer-manual-d6d6d7d/20.png)