MPC5xxxのトピックMPC5748G Clock Problem

MPC5748G Clock Problem

yankuang1 — Tue, 25 Apr 2017 07:04:45 GMT

I would like to know how to configure the MPC5748G clock.I changed the external crystal of 40M to 16M,and i multiplied the clock into 160M according to the documents shown in the attachment.I modified the code as shown below:

But the board can not be debugged successfully，the debugging information is shown below:

Re: MPC5748G Clock Problem

petervlna — Tue, 25 Apr 2017 07:26:33 GMT

Hello,

Here you go:

    // Set PLL0 to 160MHz (16MHz XTAL)
    // VCO Frequency Range 600 - 1280 MHz
    // RFDPHI1 = 10, RFDPHI = 1, PREDIV = 1, MFD = 0x28h (40)
    PLLDIG.PLLDV.R = 0x50000000 |0x00010000 |0x00001000 |0x0028 ;

XTAL = 16MHz

PREDIV = 1 -> 16/1 = 16MHz

MFD = 40 -> 40 x 16 = 640

RFDPHI = 1 -> 640/4 = 160MHz

Peter