Cheapest USB microcontroller?

Does anyone know the lowest cost microcontroller with a USB interface?

I have done some Googling, and it seems there are quite a few USB
microcontrollers based on either ARM or 8051.  Either is okay, but
they are not very cheap.  They are all over $3 @ qty 1000.

The cheapest I have found so far is the Atmel AT90USB82, which is
an AVR.  It is just under $2 @ qty 1000.

Here is what I need:

   Essential:
      USB (low or full speed)
      Cheap
      10 I/O  (8 outputs, 2 inputs)
      >= 1k program memory
      >= 256 bytes non-volatile data (eg EEPROM)

   Nice to have:
      UART
      Integrated Oscillator
      Very low power sleep mode
      Small package

   Not needed:
      High-speed USB
      Fast CPU

If anyone has any other suggestions, please let me know.

   -Bob

Bob wrote:

> Does anyone know the lowest cost microcontroller with a USB interface?
> 
> I have done some Googling, and it seems there are quite a few USB
> microcontrollers based on either ARM or 8051.  Either is okay, but
> they are not very cheap.  They are all over $3 @ qty 1000.
> 
> The cheapest I have found so far is the Atmel AT90USB82, which is
> an AVR.  It is just under $2 @ qty 1000.
> 
> Here is what I need:
> 
>    Essential:
>       USB (low or full speed)
>       Cheap
>       10 I/O  (8 outputs, 2 inputs)
>       >= 1k program memory
>       >= 256 bytes non-volatile data (eg EEPROM)

You could take a look at your computer mouse. My Dell mouse has a
CY7C63813, which you can get for $1.84 for 410 units:

http://www.componentsuperstore.com/Store/ProductDetails.aspx?ProductIdentifier=CY7C63813SXCCYPRESS3700911

It doesn't have EEPROM, but you can re-program flash blocks from the
firmware. USB is low speed, only. It has 8k flash and 256 bytes RAM.

-- 
Frank Buss, fb@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de

Bob wrote:

> Does anyone know the lowest cost microcontroller with a USB interface?
>
> Here is what I need:
>
>    Essential:
>       USB (low or full speed)
>       Cheap
>       10 I/O  (8 outputs, 2 inputs)
>       >= 1k program memory
>       >= 256 bytes non-volatile data (eg EEPROM)
>
>    Nice to have:
>       UART
>       Integrated Oscillator
>       Very low power sleep mode
>       Small package
>
>    Not needed:
>       High-speed USB
>       Fast CPU
>
> If anyone has any other suggestions, please let me know.
>
>    -Bob

Depending on quantity Cypress M8A and M8B  parts
used in mice and keyboards. reasonable 8 Bit processor
and good reference designs. I am biased we wrote the C
compiler for the two parts families.



Regards,

--
Walter Banks
Byte Craft Limited
http://www.bytecraft.com
walter@bytecraft.com Canada

Your need for EEPROM narrows the field considerably.  Flash is nearly
universal in MCUs, but EEPROM is much less common.  Is this actually
required?  Can it be added externally?  I expect it is a cost issue,
but you need to compare MCU with EEPROM cost vs. MCU + EEPROM cost.
You may be able to do better using a separate EEPROM.

Rick


On Jul 22, 2:32 am, Bob <bob36...@yahoo.com> wrote:
> Does anyone know the lowest cost microcontroller with a USB interface?
>
> I have done some Googling, and it seems there are quite a few USB
> microcontrollers based on either ARM or 8051.  Either is okay, but
> they are not very cheap.  They are all over $3 @ qty 1000.
>
> The cheapest I have found so far is the Atmel AT90USB82, which is
> an AVR.  It is just under $2 @ qty 1000.
>
> Here is what I need:
>
>    Essential:
>       USB (low or full speed)
>       Cheap
>       10 I/O  (8 outputs, 2 inputs)
>       >= 1k program memory
>       >= 256 bytes non-volatile data (eg EEPROM)
>
>    Nice to have:
>       UART
>       Integrated Oscillator
>       Very low power sleep mode
>       Small package
>
>    Not needed:
>       High-speed USB
>       Fast CPU
>
> If anyone has any other suggestions, please let me know.
>
>    -Bob

On 22 juuli, 09:32, Bob <bob36...@yahoo.com> wrote:
> Does anyone know the lowest cost microcontroller with a USB interface?
>
> I have done some Googling, and it seems there are quite a few USB
> microcontrollers based on either ARM or 8051. =A0Either is okay, but
> they are not very cheap. =A0They are all over $3 @ qty 1000.
>
> The cheapest I have found so far is the Atmel AT90USB82, which is
> an AVR. =A0It is just under $2 @ qty 1000.
>
> Here is what I need:
>
> =A0 =A0Essential:
> =A0 =A0 =A0 USB (low or full speed)
> =A0 =A0 =A0 Cheap
> =A0 =A0 =A0 10 I/O =A0(8 outputs, 2 inputs)
> =A0 =A0 =A0 >=3D 1k program memory
> =A0 =A0 =A0 >=3D 256 bytes non-volatile data (eg EEPROM)
>
> =A0 =A0Nice to have:
> =A0 =A0 =A0 UART
> =A0 =A0 =A0 Integrated Oscillator
> =A0 =A0 =A0 Very low power sleep mode
> =A0 =A0 =A0 Small package
>
> =A0 =A0Not needed:
> =A0 =A0 =A0 High-speed USB
> =A0 =A0 =A0 Fast CPU
>
> If anyone has any other suggestions, please let me know.
>
> =A0 =A0-Bob

there exist china made usb flash micros with 1.0 usd cost, but they
arent easy to get
1.84 is already not so bad

i did recall c8051f326 pricing 2.36 usd but digikey list a bit more so
you maybe cant get at 2.30
they are nice as they have onchip oscillator and run FS not LS like
the cypress cheap things
i also considered myself once the USB82 ,but eh the last penny is not
always worth saving
also if you need add crystal :(

so if you can use LS use the sub 2 usd cypress LS chip

Antti

Bob wrote:
> Does anyone know the lowest cost microcontroller with a USB interface?
> 
> I have done some Googling, and it seems there are quite a few USB
> microcontrollers based on either ARM or 8051.  Either is okay, but
> they are not very cheap.  They are all over $3 @ qty 1000.
> 
> The cheapest I have found so far is the Atmel AT90USB82, which is
> an AVR.  It is just under $2 @ qty 1000.
> 
> Here is what I need:
> 
>    Essential:
>       USB (low or full speed)
>       Cheap
>       10 I/O  (8 outputs, 2 inputs)
>       >= 1k program memory
>       >= 256 bytes non-volatile data (eg EEPROM)
> 
>    Nice to have:
>       UART
>       Integrated Oscillator
>       Very low power sleep mode
>       Small package
> 
>    Not needed:
>       High-speed USB
>       Fast CPU
> 
> If anyone has any other suggestions, please let me know.
> 
>    -Bob
Microchip has $2.12

In article <3f388f3d-684e-40e0-907a-fbb1ae57f894@f36g2000hsa.googlegroups.com>,
Bob  <bob3635x@yahoo.com> wrote:
>Does anyone know the lowest cost microcontroller with a USB interface?
>
>I have done some Googling, and it seems there are quite a few USB
>microcontrollers based on either ARM or 8051.  Either is okay, but
>they are not very cheap.  They are all over $3 @ qty 1000.
>
>The cheapest I have found so far is the Atmel AT90USB82, which is
>an AVR.  It is just under $2 @ qty 1000.

If you only need low-speed USB, you can do it in software on
an ATtiny:
    http://www.obdev.at/products/avrusb/index.html
Presumably this would let you shave a little off the MCU cost, but the
USB implementation licensing might eat up that advantage.

-- 
   Wim Lewis <wiml@hhhh.org>, Seattle, WA, USA. PGP keyID 27F772C1