Looking for a SPI to multiplexed adress/data bus 'bridge'

Good afternoon,

I need to replace the 80186 compatible CPU on a design from us
by a more modern CPU module that has no data bus but an SPI
interface.

I found some SPI-IO expander chips, I could probably use
a simple CPLD, but a ready-to-use bridge chip that converts
to a 8-bit multiplexed data/address bus would be very nice.

Does anyone know of such a chip?

What *exactly* do you want to interface to? Why doesn't the I/O

On Mar 24, 11:43 am, Thomas Heller <thel...@python.net> wrote:
Good afternoon,

I need to replace the 80186 compatible CPU on a design from us
by a more modern CPU module that has no data bus but an SPI
interface.

I found some SPI-IO expander chips, I could probably use
a simple CPLD, but a ready-to-use bridge chip that converts
to a 8-bit multiplexed data/address bus would be very nice.

Does anyone know of such a chip?

What *exactly* do you want to interface to? Why doesn't the I/O
expander work for you?

Good afternoon,

I need to replace the 80186 compatible CPU on a design from us
by a more modern CPU module that has no data bus but an SPI
interface.

I found some SPI-IO expander chips, I could probably use
a simple CPLD, but a ready-to-use bridge chip that converts
to a 8-bit multiplexed data/address bus would be very nice.

Does anyone know of such a chip?

Thanks,
Thomas

Good afternoon,

I need to replace the 80186 compatible CPU on a design from us
by a more modern CPU module that has no data bus but an SPI
interface.

I found some SPI-IO expander chips, I could probably use
a simple CPLD, but a ready-to-use bridge chip that converts
to a 8-bit multiplexed data/address bus would be very nice.

Does anyone know of such a chip?

Thanks,
Thomas

do you mean 16 bit MCU ?

"Thomas Heller" <theller_at_python.net> ???
news:80utplF18qU1_at_mid.individual.net ???...
Good afternoon,

I need to replace the 80186 compatible CPU on a design from us
by a more modern CPU module that has no data bus but an SPI
interface.

I found some SPI-IO expander chips, I could probably use
a simple CPLD, but a ready-to-use bridge chip that converts
to a 8-bit multiplexed data/address bus would be very nice.

Does anyone know of such a chip?

Thanks,
Thomas

townt.com schrieb:
do you mean 16 bit MCU ?

Yes, but an 8-bit data bus would be sufficient.

"Thomas Heller" <theller_at_python.net> ???
news:80utplF18qU1_at_mid.individual.net ???...
Good afternoon,

I need to replace the 80186 compatible CPU on a design from us
by a more modern CPU module that has no data bus but an SPI
interface.

I found some SPI-IO expander chips, I could probably use
a simple CPLD, but a ready-to-use bridge chip that converts
to a 8-bit multiplexed data/address bus would be very nice.

Does anyone know of such a chip?

Thanks,
Thomas