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AM2634-Q1: PC/104 interface

Shivam .
Prodigy 10 points
Part Number: AM2634-Q1

Tool/software:

Dear TI Support,

I am working on a Battery Management System (BMS) design and using the AM2634-Q1 microcontroller. I am quite new to hardware system design, so I would really appreciate your guidance.

I need to interface the AM2634-Q1's GPMC (General-Purpose Memory Controller) interface to a PC/104-based peripheral. Could you please help me understand: -

     1. How can I connect the GPMC interface to a PC/104 bus system?

     2. Is GPMC compatible with standard PC/104 (ISA or PCI) signals?

     3. Do I need a bridge or additional logic between GPMC and PC/104?

     4. Are there any reference designs, application notes, or guidelines?

     5. What are the signal voltage levels on GPMC, and do I need level shifting to meet PC/104 specifications?

     6. How do I configure the GPMC in the AM2634-Q1 to operate in a mode compatible with memory-mapped peripherals like those used on PC/104 boards?

     7. Is there software/driver support in the SDK or MCU+ SDK to access PC/104 peripherals via GPMC?

     8. Any TI recommendations for interfacing with legacy parallel buses like PC/104 or ISA using modern MCUs like the AM2634-Q1?

     9. Are there any limitations or risks (electrical or timing-wise) that I should be aware of when trying to achieve this communication?

  • 0
    TI__Expert 3220 points

    Hi Shivam,

    Thank you for the query!!

    We have so far not tested PC/104 interfacing with AM263x GPMC. 
    Please allow me to come back on this after discussing with GPMC experts / Systems team.


    Thanks & Regards,
    Rijohn

  • 0 in reply to Rijohn Pius
    TI__Expert 3220 points

    Hi Shivam,

    Thank you for your patience.

    GPMC in AM263x device has 21 address lines , 16 data lines for interfacing 16-bit memory. The signals used in GPMS IP are present in AM263x Datasheet section 6.3.12 GPMC. 

    Shivam . said:
    Are there any reference designs, application notes, or guidelines?

    Interface level connections and corresponding signal used in various modes of GPMC are present in 13.3.1.2.1 GPMC Modes and Table 13-161. GPMC Pin Multiplexing Options in AM263x TRM

    Shivam . said:
     5. What are the signal voltage levels on GPMC,


    In AM263x GPMC signals operate in 3.3V.

    Shivam . said:
     6. How do I configure the GPMC in the AM2634-Q1 to operate in a mode compatible with memory-mapped peripherals like those used on PC/104 boards?

    From what i understand it should be similar to interfacing of SRAM / PSRAM. For this we will have to configure various GPMC Timing Parameters for the corresponding chip select. Please refer to TRM section 13.3.1.4.6.1 GPMC I/O Configuration Setting and 13.3.1.4.8 GPMC Timing Setting for more details.

    Shivam . said:
    7. Is there software/driver support in the SDK or MCU+ SDK to access PC/104 peripherals via GPMC?

    No, currently we have a GPMC-PSRAM example in MCU_PLUS_SDK. Path:  C:\ti\mcu_plus_sdk_am263x_10_02_00_13\examples\drivers\gpmc\gpmc_psram_io

    Shivam . said:
    PC/104-based peripheral


    Can you please share the interface level detail of this peripherals?




    Thanks & Regards,
    Rijohn