I want to connect TNT4882 to 80186ER.

[Firmware_programmer]

The CPU work in 16bits. If I want to work in 16 bits with TNT4882 how I write to internals registers? (Them are 8bits only?). I ask this question because as now I connect TNT4882 to 8051.

[AaronK]

Hi,
This depends on what kind of transfer you are doing. For example if you want to do DMA, the ABUSN and BBUSN have to be deasserted to enable 16 bit DMA transfers. The Adress 0:4 need to be set to 11000 to make the transfer happen. There is a really good user manual that explains how to set things up and program the chip. Please refer to http://www.ni.com/pdf/manuals/320724.pdf for more information.

Hope this helps,
Aaron K.
Application Engineer
National Instruments

[Geneva L.]

There is also a website with various Register-Level Programming Resources

http://www.ni.com/support/gpib/reg_prog.htm

that also links to a Developer Zone application note called "Using the TNT4882 in an 8051-Family Microcontroller-Based System".