Programing pins of SyncMOS SM8952AC25P

Discussion in 'Embedded Systems and Microcontrollers' started by iCantSleep, Apr 15, 2015.

  1. iCantSleep

    Thread Starter New Member

    Apr 13, 2015
    Hi To All,

    Im new to microcontroller programming, i need help identifiying the MISO,MOSI,SCK of this microcontroller SyncMOS SM8952AC25P so that i can start reprogramming.

    My Pupose is to alter the program in a TIMER BOARD used in internet SHOPS here in the Philippines, this timer board cost only around 3$ so if I will be able to reprogram it, i can control 2 relays for only 3$.

    The microcontroller is SyncMOS SM8952AC25P i was reading the Datasheet but i never saw "MISO,MOSI, and SCK" please help me locate these pins.

    Please see attached datasheet for this micro controller.

  2. Brevor

    Active Member

    Apr 9, 2011
    That uP is an 8052 variant, it does not have those pins. Are you trying to connect a programmer?
  3. JohnInTX


    Jun 26, 2012
    It does not look like this particular variant supports ISP (in system programming).
    SyncMOS link:
    You would have to program it with an external programmer that you drop the chip into, blast it then put it back in the circuit.

    You might consider replacing the chip with something pin-compatible that supported ISP (usually a cheaper way to go) - Like the Atmel 89S52

    Good luck!
    iCantSleep likes this.
  4. iCantSleep

    Thread Starter New Member

    Apr 13, 2015
    HI, thanks for your reply now i know it doesnt really have those pins.

    Im into arduino at the moment, i saw people using arduino as programmer, im planing to reprogram it using arduino but like I said i cant locate the pins MISO MOSI and SCK. thanks to you now its confirmed the chip dont have it.

    do you have any suggestion? how about the tx and rx pins? can i use it with arduino as ISP?
  5. iCantSleep

    Thread Starter New Member

    Apr 13, 2015
    Hi John thanks alot for the information very helpful. I checked the price of the 89S52 its around 8$ here in PH. will blew my budget right away. ill just use digispark at the moment. thanks alot guys! I appreciate it.