Other micros that have PIC-like "Quadrature Encoder" on-chip?

Started by Anonymous in comp.arch.embedded15 years ago 4 replies

I have an application where i'd want to use the 'quadrature encoder' on the PIC, especially since it has programmable filtering...

I have an application where i'd want to use the 'quadrature encoder' on the PIC, especially since it has programmable filtering capabilities. However, there are so many erratas with using the deadtime feature in their PWM modules that i'm sure to get some shoot-through. Does anyone know if there are any Freescale (preferably M68HC09) parts that would be functionally equivalent to the PIC1...


Microcontroller selection

Started by Anonymous in comp.arch.embedded14 years ago 19 replies

I'm just wondering if anyone is aware of any > 100MHz 16 bit or 32 processors that are available in QFP packages? I need lots of GPIO as well...

I'm just wondering if anyone is aware of any > 100MHz 16 bit or 32 processors that are available in QFP packages? I need lots of GPIO as well as SPI and UART ports. I've looked at a couple but it seems to jump from 50-60 MHz general use processors from the likes Atmel and Freescale to > 200MHz processors on par with PDA types of duties which are way beyond what I really need (and tend to be in


MC9S08GT or GB standalone programming.

Started by Steven Swift in comp.arch.embedded14 years ago 2 replies

We have quite a few products which use the MC68HC705C8 micro from Freescale. We are deciding to move to the MC9S08 to keep the changes minor and...

We have quite a few products which use the MC68HC705C8 micro from Freescale. We are deciding to move to the MC9S08 to keep the changes minor and to keep existing software working. It took less than a day to modify the HC05 tools to assemble correct S08 code. The problem is the production programming. Right now we release "master eproms" that the techs can use to program the HC705. This is ...


Best choice: MPC83xx or 440EP?

Started by Jan R in comp.arch.embedded13 years ago 1 reply

Good day, I was hoping to tap into some expert opinions. We are currently deciding on a Host CPU to use as base for a whole range of products....

Good day, I was hoping to tap into some expert opinions. We are currently deciding on a Host CPU to use as base for a whole range of products. We narrowed it down to two possible candidates: FreeScale MPC83xx AMCC 440EP | x Both offer similar features and cost. What I would like to know is if there are any issues with any of the above. Things like: - Linux software support and t...


BestComm DMA Configuration Tool

Started by Anonymous in comp.arch.embedded14 years ago 1 reply

hello everyone I want to build custom DMA tasks for the MPC5200B. I saw a lot of docs from freescale about the BestComm DMA Config tool, but...

hello everyone I want to build custom DMA tasks for the MPC5200B. I saw a lot of docs from freescale about the BestComm DMA Config tool, but coudn't find it on any site.. Where can i get it from? Also i where can i get the sas perl scripts used to translate the task c-like code..


Looking for a cheap LCD Display

Started by dehati in comp.arch.embedded12 years ago 2 replies

I am looking for a Cheap LCD display. Can not we use one of the LCD Diplays from the Chinese manufacturers used in the $90 DVD players. We will...

I am looking for a Cheap LCD display. Can not we use one of the LCD Diplays from the Chinese manufacturers used in the $90 DVD players. We will use the freescale or other processor with in build LCD drivers .... dehati http://referencedesigner.com


Looking for a 6809E User Manual in PDF.

Started by Paul Marciano in comp.arch.embedded13 years ago 10 replies

A few years ago there was a Motorola 6809E User Manual available in PDF form. It's gone from the Freescale documentation website now, and I...

A few years ago there was a Motorola 6809E User Manual available in PDF form. It's gone from the Freescale documentation website now, and I haven't been able to find it via Google. If anyone has this, or a link to it, can they please email it to me. Thanks, Paul.


Automotive MCUs

Started by treborlecs in comp.arch.embedded6 years ago 9 replies

I'm currently looking to specify two MCUs for an automotive application. The first will be driving an small OLED and the second will be...

I'm currently looking to specify two MCUs for an automotive application. The first will be driving an small OLED and the second will be driving solenoids (and some other duties). Both connected via CAN. Normally I would use an ARM based MCU (familiarity and tools) but apart from a single TI CM3, 99% are not automotive qualified / have the temperature range. After lots of searching Freescale se...


UART speed problem

Started by Jack in comp.arch.embedded10 years ago 11 replies

Hi, I need an opinion: a customer wish to comunicate with our board (that uses a Freescale MC56F8037 to control a BLDC motor with hall sensor...

Hi, I need an opinion: a customer wish to comunicate with our board (that uses a Freescale MC56F8037 to control a BLDC motor with hall sensor for commutations and an encoder for position sensing) via a RS485 bus with a baudrate of 230400 bps. the frames are 16byte in length and a reply is expected within 3 msec (communication should be every 80 msec). I'm not sure that the 8037 can hand...


Motorola MC68HC908QT4 evaluation board; why 5V?

Started by Clifford Heath in comp.arch.embedded15 years ago 1 reply

The Motorola/Freescale $25 eval board uses a 78L05, and runs the MCU at 5V. Why, when the data sheet says it expects 3V? Granted the abs max is...

The Motorola/Freescale $25 eval board uses a 78L05, and runs the MCU at 5V. Why, when the data sheet says it expects 3V? Granted the abs max is 6V, but surely they'd want the eval board to run at the rated voltage? Was it just to avoid a more expensive 3V '232 variant?


about Maxim MAX3421E

Started by liste11 in comp.arch.embedded11 years ago 11 replies

Hello All, I need a feedback about MAX3421E. I'm developing a particular device, and my boss wondering if we are able to add on our device the...

Hello All, I need a feedback about MAX3421E. I'm developing a particular device, and my boss wondering if we are able to add on our device the USB. I'm using a Freescale MFC5213 micro, and I'm able to use SPI, so my question regarding the effort required to implement this part. I read something on the web about this component (MAX3421E), but would be great for me to have a feedback directly...


Simple & small MCU with 4 UARTS

Started by eliben in comp.arch.embedded11 years ago 23 replies

Hello, This question comes up from time to time, and I want to see if there's anything new in the offerings. I need an MCU with 4 UART (@...

Hello, This question comes up from time to time, and I want to see if there's anything new in the offerings. I need an MCU with 4 UART (@ 38.4 KBaud each) and several IOs. The 4 UARTs is a problem, because the simplest MCUs (PIC, AVR) don't have chips with this amount (AFAIK). I've seen various suggestions: 1) Use a different MCU (Renesas, Freescale), etc. I'm reluctant to do it, b...


Unfamiliar code construct

Started by Bruce Varley in comp.arch.embedded6 years ago 6 replies

Copiedt following straight out of a Freescale application note. The second doesn't look familuar. Is this a standard C construct, and likely to...

Copiedt following straight out of a Freescale application note. The second doesn't look familuar. Is this a standard C construct, and likely to be accepted by most IDEs? Does it just mean read SCISR1 and discard the result? if (SCISR1 & 0x80){ SCISR1; if(*(SCIStringp++) != '\0'){ if(*SCIStringp > 0xD){ /*Avoid to change CR and LF characters*/


Getting started w/ Coldfire

Started by Rob Gaddi in comp.arch.embedded11 years ago 4 replies

So I'm considering moving over from writing assembly on the Freescale 68332 to writing C on the 5275 v2 Coldfire. I've got their M5272 dev kit in...

So I'm considering moving over from writing assembly on the Freescale 68332 to writing C on the 5275 v2 Coldfire. I've got their M5272 dev kit in hand, and have started poking around at it in a fairly non-specific way, and have run into a few questions that I figured I'd solicit some help on. A) So they gave me the limited trial version of CodeWarrior. Last time I did any development under Co...


SPI performance on Freescale MPC83xx?

Started by Matthias in comp.arch.embedded14 years ago 6 replies

Hi, In our project, due to some restrictions and requirements we would have to use the SPI of a Frescale MPC83xx for receiving a continous...

Hi, In our project, due to some restrictions and requirements we would have to use the SPI of a Frescale MPC83xx for receiving a continous stream of serial data at a bit rate of at least 500 kbps, but would like to use modes with up to 12 Mbps as well. As it seems, there is no DMA support for SPI, so we would have to spend CPU time for this (either via interrupts or via kind of polling)....


Graphics controller for PowerPC

Started by Elder Costa in comp.arch.embedded15 years ago 17 replies

Hello. I am looking at some possible processor architectures for future products. Intel offers some Pentium III and Pentium M derivatives...

Hello. I am looking at some possible processor architectures for future products. Intel offers some Pentium III and Pentium M derivatives plus chipsets that include peripherals and graphics controllers with 2D acceleration. I have browsed through Freescale page looking at their several PPC families. There are some very interesting SOCs based on medium to high end CPUs (which I guess...


Microprocessor recommendations?

Started by Rocky in comp.arch.embedded13 years ago 19 replies

Hi All, I want to move to something bigger than a Z80/8032/PIC which I use at the moment. I would like about 50 MIPS, 1MByte Flash, 256KByte...

Hi All, I want to move to something bigger than a Z80/8032/PIC which I use at the moment. I would like about 50 MIPS, 1MByte Flash, 256KByte RAM - possibly all external, integrated ethernet, 2 serial ports, enought DSP capability to do 2 or so channels VOIP, the ability to self program (bootloader) for remote update. I have looked at ST, Freescale and Rabbit. The rabbit seems to be alm...


Newbie puzzled by HC908 programming

Started by bhet...@gmail.com in comp.arch.embedded13 years ago 6 replies

I'm a complete neophyte when it comes to hardware, so I'm sure I'm doing something completely stupid in the way I am trying to program...

I'm a complete neophyte when it comes to hardware, so I'm sure I'm doing something completely stupid in the way I am trying to program a Freescale HC908QY4CPE. I built the programming circuit shown in the manual and have tried downloading a program using the protocol documented in the manual. I have checked and rechecked connections, voltages, parts. The oscillator is oscillating, the bits...


How To Drive and Read A 4-20mA Sensor

Started by eeboarder in comp.arch.embedded11 years ago 8 replies

Hello, I have limited experience with microcontrollers, all with freescale HC12 and HCS12 systems. I have dealt with 0-5V sensors through ADC...

Hello, I have limited experience with microcontrollers, all with freescale HC12 and HCS12 systems. I have dealt with 0-5V sensors through ADC before, too. I currently have a project where I might have to use a 4-20mA sensor. How would I go about electrically interfacing a 4-20mA sensor to a generic microcontroller? How would you power it and read it? Is there an IC available? Any suggest...


Ultra low-cost ARM Module

Started by Mei Zhang in comp.arch.embedded4 years ago 1 reply

MYIR offers various ARM modules. The freescale i.MX28 industrial module is an ARM9 SOM board of which the price is Ultra low only starts from...

MYIR offers various ARM modules. The freescale i.MX28 industrial module is an ARM9 SOM board of which the price is Ultra low only starts from USD22/pc. http://www.myirtech.com/list.asp?id=472