xmp.py

#!/usr/bin/env python3

with open("spd.bin", "rb") as f:
    spd = f.read()

for profile in range(2):
    print(f"XMP profile {profile + 1}:")

    if profile == 0:
        mtb = int((spd[180] << 8) / spd[181])
    elif profile == 1:
        mtb = int((spd[182] << 8) / spd[183])
    print(f"MTB: {mtb}")

    if profile == 0:
        xmp = spd[185:219]
    elif profile == 1:
        xmp = spd[220:254]

    cas_lats = (xmp[4] << 8) | xmp[3]
    print(bin(cas_lats))

    def timing(name, offset):
        t = xmp[offset] * mtb / 256
        print(f"{name}: {t} {t/tCK}")

    tCK = xmp[1] * mtb / 256
    print(f"tCK: {tCK}")
    Hz = int(2000 / tCK)
    print(f"fMin: {Hz}")

    timing("tAA", 2)
    timing("tWR", 8)
    timing("tRCD", 7)
    timing("tRRD", 17)
    timing("tRP", 6)

    tRAS = (((xmp[9] & 0xf) << 8) + xmp[10]) * mtb / 256
    print(f"tRAS: {tRAS}")

    tRC = (((xmp[9] & 0xf0) << 4) + xmp[11]) * mtb / 256
    print(f"tRC: {tRC}")

    tRFC = ((xmp[15] << 8) + xmp[14]) * mtb / 256
    print(f"tRFC: {tRFC}")

    timing("tWTR", 20)
    timing("tRTP", 16)

    tFAW = (((xmp[18] & 0xf) << 8) + xmp[19]) * mtb / 256
    print(f"tFAW: {tFAW}")

    timing("tCWL", 5)
    timing("tCMD", 23)

    print()