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Text File | 1994-05-03 | 3.2 KB | 59 lines | [TEXT/ERIC] |
- IBM AND MOTOROLA ANNOUNCE EMBEDDED POWERPC COMPETITORS
-
- (April 29) IBM and Motorola both formally announced their PowerPC
- entrants into the embedded processor market last week. Unlike
- previous PowerPCs, IBM's PPC 403GA and Motorola's RMCU 505
- processors are not joint efforts, neither are they equivalent
- offerings.
-
- IBM is giving comparatively few details about the PPC 403GA until
- around September, when general sampling and pricing will be announced.
- The company says that the 32bit chip has a four-channel DMA
- controller, DRAM controller, I/O controller, two-way set associative
- instruction and data caches, serial port, multi-level interrupt
- controller and multiple timer facilities on-board. There are no
- details of architecture, or what the PowerPC core implementation
- looks like. Microelectronics says it is aiming the chip primarily at
- the office peripherals, consumer video (such as digital video
- cameras), personal communications and networking markets.
-
- Motorola was significantly more forthcoming: its RMCU505 has a
- PowerPC core stripped down so that only a single instruction is
- despatched at a time. Consequently, it has Spec ratings in the 20-ish
- range, roughly equivalent to a 68040 processor, Motorola reckons.
- These are only estimates, unfortunately, as Motorola measures their
- performance through Dhrystone and Whetstone ratings (51k and 12.5k,
- respectively at 25MHz with internal RAM). The chip has the same three
- power saving modes as the MPC 603 as well as 12 on-chip programmable
- chip selects, which soak up a lot of the interfacing glue normally
- needed to link processors and peripherals. Motorola has a well
- publicised agreement with Ford Motors to provide engine-management
- and power-train controllers. However, the semiconductor manufacturer
- says that the RMCU505 is not the Ford chip.
-
- The RMCU505 is due to begin sampling in the fourth quarter of the
- year, for $75 each in 100-piece quantities. The company says it
- expects volume pricing to hit around $25 by 1997. Motorola is still
- tweaking the production processor to get power consumption down,
- but by the end of the year it expects the 3.3v chip to be drawing only
- 530milliwatts when running flat out at 25MHz.
-
- This is only the first in what Motorola says will be a line of PowerPC-
- based embedded controllers. For a start, clock speed is envisaged to
- rise to 40MHz; voltage needs are supposed to fall; and there is talk
- of a chip based more closely on the MPC603 with consequently greater
- processing power. Motorola also makes great play of its ability to
- produce new chips by pick 'n' mixing from the functional modules on
- its existing chips. All Motorola processors conform to a set of
- 'universal design rules', according to the company. This combined with
- it silicon-bus approach to chip design, means in theory that
- Motorola's chip designers can grab a particularly nice FPU from here,
- a particularly fast serial controller from there and stitch them into
- a new embedded chip. The Inter Module Bus, which forms the backbone
- of this approach, first appeared in the 68300. Motorola says the new
- chip will incorporate a new version of the bus, which extends its
- ability to re-use parts.
-
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