AT&T Co today expands its Hobbit RISC family with three new chip sets designed for different design points from minumum power consumption to comprehensive communications. The Hobbit is a RISC-like processor optimised for C, and the three new ones are the 20MHz ATT92020S version, which is rated at 16 VAX MIPS, the ATT92020M, rated at 13.5 VAX MIPS, and the ATT92020MT, 11 VAX MIPS. The 92020S includes 6Kb three-way set-associative instruction cache, 256-byte stack cache and 32-bit address and data buses. Pin-compatible with the original ATT92010, it draws 210mW when active, one microWatt in sleep mode. It supports the ATT92011 system controller, 92012 four-channel PCMCIA interface, 92013 auxilliary input-output interface and 92014 display controller. The 92020M is a more highly integrated version, which comes as a set with the 92021M system controller and the 92024M display controller, and offers the performance and power drain of the 92010 in a more highly-integrated chip set. It has 6Kb pre-fetch buffer and 32-bit multiplexed address and data bus. The system controller includes a dual-channel PCMCIA interface with choice of 16- or 32-bit ROM data path. The most highly integrated part is the 92020MX, which needs just the 92021MX system controller and memory for a complete system. The company reckons that with it, designers can build personal communicators as small as cellular telephones, and get close to 24-hour battery life. It has 3Kb pre-fetch buffer and 32-bit multiplexed address and data bus. The integral video controller supports up to 640 by 480 pixel resolution. All run at a maximum 20MHz off 3.3V, but will go up to 30MHz if a 5V supply is acceptable. Samples of all three are out now with volume in first quarter 1994 at $32 for 10,000-up of the 92020MX to $37 for 10,000-up of the 92020S. AT&T’s Eo Inc affiliate uses the earlier Hobbit.
