topgun@chaos.cs.brandeis.edu (Chandra Bajpai) (03/21/90)
Does anybody have any information on the New 68070 Signetics microprocessor? It seems to have: - 68000 CMOS Core running at 16 Mhz - Dual DMA Channels - Serial Port - Timer - Built in MMU for Virtual Memory (128K Page Frames) Is this chip available? What is Signetics asking for '070 in volumes? Thanks, Chandra Bajpai topgun@brandeis.cs.edu
fnh@coyote.philips.com (Fletcher Holmquist;6483;4.85;$0351) (03/22/90)
In article <1990Mar20.171614.12694@chaos.cs.brandeis.edu> topgun@chaos.cs.brandeis.edu (Chandra Bajpai) writes:
Path: philabs!linus!think!mintaka!chaos.cs.brandeis.edu!topgun
From: topgun@chaos.cs.brandeis.edu (Chandra Bajpai)
Newsgroups: comp.sys.m68k
Date: 20 Mar 90 17:16:14 GMT
References: <11857@etana.tut.fi>
Organization: Brandeis University Computer Science Dept
Lines: 16
Does anybody have any information on the New 68070 Signetics microprocessor?
It seems to have:
- 68000 CMOS Core running at 16 Mhz
- Dual DMA Channels
- Serial Port
- Timer
- Built in MMU for Virtual Memory (128K Page Frames)
Is this chip available? What is Signetics asking for '070 in volumes?
Thanks,
Chandra Bajpai
topgun@brandeis.cs.edu
=====
The 68070 has been out for a year in a 10MHz version, and the 15Mhz part
should be available from distributers now. I do not know the price, but it
should be inexpensive.
Yes, it has:
- 68000 CMOS Core running at 10 or 15Mhz
- Dual DMA Channels (68450 compatible)
- UART (2691 compatible)
- Timer: 16-bit
- MMU (128 128Kb segments or 8 2Mb segments)
- I2C Serial Bus (See below)
- 68010-style exception handling
- 16Mb address range
- Interrupt decoding
- 84-pin PLCC package
There is a matching Video and System Controller (VSC) which provides a DRAM
controller, video controller (768x560), byte-blitter and sundry system glue.
I have not used it, but it should be a good choice if you want a bit-mapped
display. It is part number SCC66470B.
There is a hardware manual for the 68070, mine is dated 1988 (Philips).
The full title is "SCC68070 User Manual Part 1 - Hardware." The manual for
the VSC should also be out now. Ask a distributer.
One of the things I like about the 68070 is the I2C (Inter IC) bus. It is a
100Kbit serial bus (data, clock and ground) with multiple masters and
arbitration. It makes adding I2C parts easy, just connect three wires. My
TV at home uses I2C parts for tuning, volume, tint, color, TOD clock and
EEPROM'd parameters. I can tap in and read the status of or control these
ICs via an external 68070 system. Get the I2C Data Handbooks (IC12a and 12b)
for data on available parts.
I do not speak for Philips.
---
fletch holmquist robotics and flexible automation
fnh@philabs.philips.com philips laboratories
(914) 945-6483 345 scarborough road
briarcliff manor, ny, 10510
--
fletch holmquist robotics and flexible automation
fnh@philabs.philips.com philips laboratories
(914) 945-6483 345 scarborough road
briarcliff manor, ny, 10510ehs@jumbo.dec.com (Ed Satterthwaite) (03/24/90)
(My apologies if this one has already been done to death -- we lost our netnews feed for a few days this week.) In article <1990Mar20.171614.12694@chaos.cs.brandeis.edu>, topgun@chaos.cs.brandeis.edu (Chandra Bajpai) writes: > > Does anybody have any information on the New 68070 Signetics microprocessor? ... summary of features > Is this chip available? What is Signetics asking for '070 in volumes? It's actually not all that new; I have a User Manual dated 1988 and a data sheet (Product Specification) dated May 1989. The SCC68070 is in the current Signetics price book with clock speeds of 10, 12.5 and 15 MHz. Prices in quantity 1000 are $20 or a bit less depending on speed grade; quantity 1 prices about $10 higher. Philips (Signetics' parent company) is making several variations on the same theme in its 90c1xx family. The 93c110 has on-chip ROM, RAM, and EEPROM and lots of configurable port pins but no DMA or MMU. If this sort of part fits your application, look at the Motorola 68302 as well. It's based on a 16.7 MHz 68hc000 core with on-chip dual-ported RAM (1152 bytes, partially dedicated to control blocks) 3 full-duplex serial communications channels configurable for most popular protocols and supported by 6 internal DMA channels optional multiplexing of serial outputs to meet ISDN requirements 1 external DMA channel integrated interrupt controller 2 parallel i/o ports (some pin functions shared) 3 timers 4 programmable chip-select/wait-state generators DRAM refresh controller (later revisions only). This part is definitely real -- one is running the prototype version of my current project. Last I checked, the PGA version was ~$45 in quantity one; there are also quad flatpack versions with pricing comparable to the 68070. Compared to the latter, the 68302 provides better support for serial line interfaces and subsumes more of the system glue logic. On the other hand, there is only a single external DMA channel and it's less flexible than the 68070's. There is also no integrated MMU, if that matters for some reason. The 68302 is pretty clearly aimed at the telecom market, especially ISDN. I've heard that the 68070 was originally done as a high-end controller for consumer electronics (CD players and the like). To go further upscale, there's also the 68332 to consider. Ed Satterthwaite ehs@src.DEC.COM or {...}!decwrl!ehs
bbs00015@uafcseg.uucp (Patrick Spinler) (03/24/90)
In article <14735@jumbo.dec.com>, ehs@jumbo.dec.com (Ed Satterthwaite) writes: > The SCC68070 is in the > current Signetics price book > ... > > Ed Satterthwaite > ehs@src.DEC.COM or {...}!decwrl!ehs Does anyone have Signetics' address ? If so, please mail it to me. Thanks -- Pat pspinler%mkvax1.decnet@msus1.bitnet ps. please don't reply to this article, as this is a shared guest account.