DP83955A
DP83955A is LitE Repeater Interface Controller manufactured by National Semiconductor.
Description
Specifications enclosed describe both the DP83955 and the The DP83955 56 Lit E Repeater Interface Controller DP83956 unless otherwise noted (LERIC) may be used to implement an IEEE 802 3 multiport repeater unit It fully satisfies the IEEE 802 3 repeater speci For IEEE 802 3 multiport repeater applications which refication including the functions defined by the repeater segquire conformance to the IEEE 802 3 Draft Repeater Manment partition and jabber lockup protection state machines agement options the DP83950 Repeater Interface Controller (RICTM ) is remended especially for highly-managed The LERIC has an on-chip phase-locked-loop (PLL) for Manchester data decoding a Manchester encoder and an hub requirements Elasticity Buffer for preamble regeneration Features
Each LERIC can connect up to 7 cable segments via its Y pliant with the IEEE 802 3 Repeater Specification network interface ports One port is fully Attachment Unit Interface (AUI) patible and is able to connect to an ex Y 7 network connections (ports) per chip ternal Medium Attachment Unit (MAU) using the maximum Y Selectable on-chip twisted-pair transceivers length of AUI cable The other 6 ports have integrated Y Cascadable for large multiple RIC LERIC hub 10BASE-T transceivers These transceiver functions may applications be bypassed so that the LERIC may be used with external Y patible with AUI pliant transceivers transceivers such as National’s DP8392 coaxial transceiv Y On-chip Elasticity Buffer Manchester encoder and er In addition large repeater units may be constructed by decoder TM cascading LERICs together over the Inter-LERIC or Inter Y Separation Partition state machines for each port RICTM bus Y Provides port status information for LED displays The LERIC is configurable for specific applications It proincluding receive collision partition polarity and link vides port status information for LED array displays Addistatus tionally the LERIC has a m P interface to provide individual Y Power-up...
