Interfacing 8-bit parallel memory with MC9S12XEP100

shraddhanagle — Mon, 09 Oct 2017 03:32:27 GMT

Hello,

I have interfaced MC9S12XEP100 with 8-bit (16 address lines) parallel EEPROM where the A0 line of MC9S12XEP100 is connected to A0 line of EEPROM, A1 line of MC9S12XEP100 is connected to A1 line of EEPROM and so on till A15. While accessing the memory HDBE bit in EBICTL0 register is set to zero which implies DATA[15:8], UDS, and LDS disabled and ASIZ is set to 16. However, it is observed that only odd addresses of memory is accessed by the MC9S12XEP100. The A0 line of controller remains at logic HIGH level.

Is there any way to access the whole 8-bit memory using MC9S12XEP100 for above mentioned hardware configuration?

Re: Interfacing 8-bit parallel memory with MC9S12XEP100

lama — Tue, 10 Oct 2017 11:04:32 GMT

Hi,

I created a document "a few" days ago which answer your question and probably provides something more.

https://community.nxp.com/docs/DOC-93594

Search for Chapter 6 in the document attached to previous link .

Best regards,

Ladislav

topic Re: Interfacing 8-bit parallel memory with MC9S12XEP100 in S12 / MagniV Microcontrollers

Interfacing 8-bit parallel memory with MC9S12XEP100

Re: Interfacing 8-bit parallel memory with MC9S12XEP100