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AM79C970 датащи(PDF) 2 Page - Advanced Micro Devices |
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AM79C970 датащи(HTML) 2 Page - Advanced Micro Devices |
2 / 168 page P R E L I M I N A R Y AMD 1-869 Am79C970 controllers in the PCnet Family, including the PCnet-ISA controller (Am79C960), the PCnet-ISA+ controller (Am79C961), and the PCnet-32 controller (Am79C965). The buffer management unit supports the LANCE, ILACC, and PCnet descriptor software models. The PCnet-PCI controller is software compatible with the Novell NE2100 and NE1500 Ethernet adapter card architectures. In addition, a Sleep function has been in- corporated to provide low standby current, excellent for notebooks and Green PCs. The 32-bit multiplexed bus interface unit provides a di- rect interface to the PCI local bus applications, simplify- ing the design of an Ethernet node in a PC system. With its built-in support for both little and big endian byte alignment, this controller also addresses proprietary non-PC applications. The PCnet-PCI controller supports auto configuration in the PCI configuration space. Additional PCnet-PCI controller configuration parameters, including the unique IEEE physical address, can be read from an ex- ternal non-volatile memory (serial EEPROM) immedi- ately following system RESET. The controller also has the capability to automatically select either the AUI port or the Twisted-Pair trans- ceiver. Only one interface is active at any one time. The individual transmit and receive FIFOs optimize system overhead, providing sufficient latency during frame transmission and reception, and minimizing intervention during normal network error recovery. The integrated Manchester encoder/decoder (MENDEC) eliminates the need for an external Serial Interface Adapter (SIA) in the system. In addition, the device provides program- mable on-chip LED drivers for transmit, receive, colli- sion, receive polarity, link integrity or jabber status. BLOCK DIAGRAM Buffer Management Unit FIFO Control Microwire and LED Control PCI Bus Interface Unit 802.3 MAC Core Manchester Encoder/ Decoder (PLS) & AUI Port 10BASE-T MAU XTAL1 DO+/- CI+/- DI+/- RXD+/- TXD+/- TXP+/- XTAL2 Rcv FIFO Xmt FIFO CLK PAR FRAME C/ BE[3:0] TRDY IRDY LOCK IDSEL DEVSEL REQ GNT PERR SERR INTA STOP AD[31:00] RST NOUT LNKST/EEDI EECS EESK/ LED1 EEDO/ LED3 18220C-1 |
Аналогичный номер детали - AM79C970 |
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Аналогичное описание - AM79C970 |
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