Can anyone provide the LPDDR init code for K70?

[pramodk_g_]

Hi Everyone,

                          We are interfacing K70 with LPDDR (MT46H32M16LF – 8 Meg x 16 x 4 banks) and facing issues with our current configuration. Please let us know if there is any error in our configuration. Also it would be helpful if some one could provide us the correct LPDDR configuration.

Our configuration is as follows,

int ddr_init_script(void)

{

    if ((SIM_SCGC3 & SIM_SCGC3_DDR_MASK) != SIM_SCGC3_DDR_MASK)

    {

        // Enable DDR clock gate

        SIM_SCGC3 |= SIM_SCGC3_DDR_MASK;

    }

    else

    {

        // Check to if the DRAMC is already initialized

        if ((DDR_CR00 & 1) == 1)

            return 1;

    }

    // Setup drive strength & enable IO pad

    SIM_MCR &= 0xFFFFFF00;

    SIM_MCR |= 0x00000004;

    // Setup IO pad ODT, 700mV seperation & spare dly ctrl

#define DDR_PAD_CTRL    *((volatile unsigned long*)0x400AE1AC)

    DDR_PAD_CTRL = 0x00030203;

    SIM_MCR |= 0x100;    // DDR RCR reset

    SIM_MCR &= ~0x100;    // DDR RCR out of reset

    DDR_CR00 = 0x00000100;    // DDRCLS, start

    DDR_CR02 = 0x00007530;    // initaref, tinit

    DDR_CR03 = 0x01010707;    // tccd, wrlat, latgate, latlin

    DDR_CR04 = 0x07090201;    // trasmin, trc, trrd, tbint

    DDR_CR05 = 0x02000302;    // tmrd, trtp, trp, twtr

    DDR_CR06 = 0x01290404;    // intwbr, trasmax, tmod

    DDR_CR07 = 0x01010202;    // ccapen, ap, tckesr, clkpw

    DDR_CR08 = 0x06030300;    // tdal, twr, trasdi, tras

    DDR_CR09 = 0x020000c8;    // bstlen, nocmd, tdll

    DDR_CR10 = 0x03000002;    // trpab, tcpd, tfaw

    DDR_CR11 = 0x01000000;    // trefen, arefmode, aref, regdimm

    DDR_CR12 = 0x048a000b;    // tref, trfc

    DDR_CR13 = 0x00000005;    // pd, trefint

    DDR_CR14 = 0x00110002;    // txsr, tpdex

    DDR_CR15 = 0x0000000b;    // puref, sref, txsnr

    DDR_CR16 = 0x00000001;    // lpctrl, clkdly, qkref

    DDR_CR20 = 0x00030300;    // cksrx, cksre, lpre

    DDR_CR21 = 0x00000032;    // mr1dat0, mr0dat0

    DDR_CR25 = 0x0a010300;    // aprebit, colsiz, addpins, bnk8

    DDR_CR26 = 0x0101ffff;    // bnkspt, addcol, cmdage, agecnt

    DDR_CR27 = 0x00010101;    // swpen, rwen, prien, plen

    DDR_CR28 = 0x00000001;    // cmdlatr, bigend, reduc, csmap

    DDR_CR30 = 0x00000001;    // intack, rsyncrf

    DDR_CR34 = 0x00000101;    // odtwrcs, odtrdcs

    DDR_CR37 = 0x00000200;    // w2wsame, w2rsame, r2wsame, r2rsame

    DDR_CR38 = 0x00200000;    // p0wrcnt, pupcs, pdncs

    DDR_CR39 = 0x00000020;    // wp0, rp0, p0rdcnt

    DDR_CR40 = 0x00002000;    // p1wrcnt, p0typ

    DDR_CR41 = 0x01010020;    // wp1, rp1, p1rdcnt

    DDR_CR42 = 0x00002000;    // p2wrcnt, p1typ

    DDR_CR43 = 0x02020020;    // wp2, rp2, p2rdcnt

    DDR_CR45 = 0x00070b0f;    // p0pri3, p0pri2, p0pri1, p0pri0

    DDR_CR46 = 0x0f004000;    // p1pri0, p0prirlx, p0ord

    DDR_CR47 = 0x0100070b;    // p1ord, p1pri3, p1pri2, p1pri1

    DDR_CR48 = 0x0b0f0040;    // p2pri1, p2pri0, p1prirlx

    DDR_CR49 = 0x00020007;    // p2ord, p2pri3, p2pri2

    DDR_CR50 = 0x00000040;    // p2prirlx

    DDR_CR52 = 0x02000602;    // rddtenbas, phyrdlat, phywrltbs

    DDR_CR56 = 0x01030000;    // wrlatadj, rdlatadj

    DDR_CR57 = 0x01000000;    // odtalten

    DDR_CR00 |= 1;    // DDRCLS, start

    while ((DDR_CR30 & 0x400) != 0x400);

    // Setup memory address translation

    MCM_CR |= MCM_CR_DDRSIZE(0);

    return 1;

}

We created this configuration using this https://www.freescale.com/webapp/Download?colCode=KINETIS_K70_DDR_INIT&location=null&Parent_nodeId=&... tool.

Thanks

Pramod

[soledad · Accepted solution]

Hi,

The MQX BSP function that initializes SDRAM controller can be found in the source file

c:\Freescale\Freescale_MQX_4_x\mqx\source\bsp\twrk70f120m\init_hw.c.

_bsp_ddr2_setup

called by init_hardware() in the same file.

I attached the init for the mt46h32m16lf part. I hope this helps!!!!

Freescale also provides below application note about DDR2 SDRAM hardware design and initialization:

AN2910 (Hardware and Layout Design Considerations for DDR2 SDRAM Memory Interfaces) :

http://cache.freescale.com/files/32bit/doc/app_note/AN2910.pdf

AN3522 (DDR2 SDRAM on the ColdFire MCF5545x Microprocessor) : http://cache.freescale.com/files/32bit/doc/app_note/AN3522.pdf

Have a great day,
Sol

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