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AM3359: MPU frequency on AM3359 ICEv2 with PSDK RTOS

Hideaki Matsumoto
Expert 7695 points
Part Number: AM3359
Other Parts Discussed in Thread: TPS65910A

Hi,

 

Just want to confirm. What’s the MPU frequency of AM3359 on AM3359 ICEv2 with PSDK RTOS ? I found some descriptions. One mentions 800MHz, but another mentions 1GHz.

 

Regards,

Hideaki

  • 0
    TI__Mastermind 40215 points

    Hello Hideaki,

    The AM3359 ICEv2 has AM3359BZCZA80. According to the AM3359 data sheet, Table 5-7, the MPU can operate up to 1GHz, depending on VDD_MPU setting:

    Then according to AM3359 ICEv2 Hardware User's Guide, Table 1 - AM3359 Power Supplies From TPS65910A, the VDD_MPU is set to 1.1 V:

    This means the MPU operates at either 600MHz or 300MHz according to the data sheet, depending on whether the AM3359 is a AM335__ZCZ_60 (600MHz) or  AM335__ZCZ_30 (300MHz) speed grade. For that, I'm not able to find the exact information, but I would assume a higher speed grade is used here, i.e. the MPU operates at 600MHz.

    Regards,

    Jianzhong

  • 0 in reply to Jianzhong Xu
    TI__Expert 7695 points

    Hi Jianzhong,

    Thank you for your response. We'd like to know the default MPU clock set in the Processor SDK RTOS for AM3359 ICEv2. Could you tell us it ?

    Thanks and regards,
    Hideaki Matsumoto

  • +1 in reply to Hideaki Matsumoto
    TI__Mastermind 40215 points

    The default is 600MHz. If you connect the board using CCS, the GEL file initializes the clock to 600MHz. Please refer to ccs<version>\ccs\ccs_base\emulation\boards\ice_am3359\gel\TMDXICE3359.gel, 

    if(CLKIN==24)
{
   MPU_PLL_Config(  CLKIN, 0, 25, 1);			// 600 MHz
   CORE_PLL_Config( CLKIN, 2, 125, 10, 8, 4);
   DDR_PLL_Config(  CLKIN, 2, 50, 1);			// 400 MHz
   PER_PLL_Config(  CLKIN, 9, 400, 5);
   DISP_PLL_Config( CLKIN, 0, 2, 1);
   GEL_TextOut("****  AM335x ALL ADPLL Config for OPP == OPP100 is Done ......... \n","Output",1,1,1);

}

    If you use the SBL in PDK, please refer pdk_am335x_1_0_17\packages\ti\starterware\bootloader\src\am335x\sbl_am335x_platform_pll.c, 

        SblPlatformPllMpuInit(mpuDpllMult, mpuDpllDiv, mpuDpllPostDivM2);

    The multiplier and divider used by the SBL are the same as used in the GEL file. So it also configures the MPU clock to 600MHz.

    Regards,

    Jianzhong