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1999-04-27
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From: pcats@cryton.demon.co.uk (Patrick Arnold)
Subject: VLSI VY86C650 (Arm 650)
Date: Thu, 30 Dec 1993 16:06:48 +0000
With reference to the recent talk about the ARM 650, I have obtained a data
sheet on it. Here are some of the salient points:
It is described as an integrated microcontroller for applications requiring
high performance and high reliability.
The FSB elements in the VY86C650 include a memory controller for DRAM, SRAM,
ROM, flash EEPROM, and PCMCIA memory, 4K of onboard SRAM storage, interleaved
ROM control,a 4 channel dual-port DMA controller with 4x32 byte DMA buffers,
a serial controller supporting sync, async, SDLC and Localtalk protocols, a 23
level interrupt controller, and a laser printer video subsystem.
The memory controller supports up to 64 Mb of RAM and 16 Mb of ROM.
The ROM controller supports 8, 16, and 32 bit wide ROMs.
The laser printer interface supports up to 1200 DPI in 256 grey levels.
The microcontroller has a 32 bit timer-counter that supports a number of
virtual timer emulations.
It has an embedded debugger which allows stepwise debugging and access to
all the processor registers and all the memory via the JTAG test port.
The chip is obviously designed for laser printers, fax machines, etc. What the
data sheet doesn't make clear, though, is whether the chip is available from
stock with all the above options, or whether it is a custom macrocell system
for customers to specify options from. I think, from the way the sheet is
written, that it is basically describing a library of macrocells, rather than
a stock product. I may be wrong, however!
Patrick.
pcats@cryton.demon.co.uk vox+44(749)670058 fax+44(749)670809 dat+44(749)670030
From: zizzler@freenet.hut.fi (Ari Pitkänen,,,)
Date: 1 Jan 1994 20:39:22 GMT
>The chip is obviously designed for laser printers, fax machines, etc. What the
>data sheet doesn't make clear, though, is whether the chip is available from
>stock with all the above options, or whether it is a custom macrocell system
>for customers to specify options from. I think, from the way the sheet is
>written, that it is basically describing a library of macrocells, rather than
>a stock product. I may be wrong, however!
According to EDN magazine it costs $40 if you buy over 1000 pcs.