Chips and Technologies, Inc. 82C611 and 82C612 MicroCHIPS Micro Channel Interface 82C611 and 82C612 MicroCHIPS Micro Channel Interface The MicroCHIPS (Micro Channel Interface Parts) family of components integrate most of the interface logic required on an adapter card for the Micro Channel. MicroCHIPS provides many benefits to designers of add-in adapters for the Micro Channel: @ Space savings because of the single-chip VLSI approach Cost savings because of the integration of many components into one @ Time savings because of the ease of design There are currently two members of the MicroCHIPS family: The 82C611 is optimized for memory and I/O interfaces such as those on multi-function cards. It does not support the DMA arbitration and handshaking signals. The 82C612 adds full support for DMA arbitration and handshaking including single cycle and burst modes. It also supports both pre-empt and fairness modes as defined by IBM. Both chips are available in either a 68-pin plastic leadless chip carrier or an 80-pin plastic flat package. YUE) @ Implements 100% IBM PS/2 compatible Micro Channel Adapters @ 82C611 supports multi-function, I/O and memory adapters @ 82C612 supports controller-type adapters, including alt DMA slave arbitration functions @ Programmable option Select (POS) support including: o Adapter ID support oO Flexible I/O and memory relocation support oO POS Port decode logic and handshaking @ Full micro channel interface including: o Command and status decoding Response signal generation oO Full DMA slave arbitration and handshake (82C612 only) PRELIMINARY 1-5 Mi 82C611 and 82C612 MicroCHIPS Micro Channel Interface 1-6 @ Meets all IBM specified timing and drive specifications Simplifies migration of XT/AT adapter de signs to the micro channel @ Available as 68-pin PLCC or 80 pin PFP components In addition to the standard functions supplied by the 82C611 and 82C612, Chips has the capability to customize these standard devices for dedicated high-volume applications. The macrocelis for these parts can be integrated into custom controller designs. Figure 1-3. 82C611/12 Simplified System Block Diagram CYCLE EXTENSION micro cHanner | CAAD SELECT | TRANSCEIVER AOAPTER AND > CONTROL RESPONSE -+___~J surrern contron = [* SIGNALS | LOGIC 7) | EXTERNAL f OECODE , \ { MICRO CHANNEL I COMMAND LOCAL OMMAND CONTROL t GECOOE \ ootinat SIGNALS T | | | | 1 POS | { DECODE | c 1 |e@e | L aq SER | o | PIN a DEFINED | fk muure | SIGNALS a T I 13 | a 8 \ | s | va POs MICRO CHANNEL REGISTER | Pos DATA BUS at [| REGISTER ! | | | 7 U; Uf hy sigs =| V7 sneer] ds anh Eton SIGNALS | aace OF ONLY) | SIGNALS WEEE Lo J PRELIMINARY Chips and Technologies, Inc.