P89C51RD2/01 : Clock Bit Value == 0x50 ??

[codematic]

Greetings,

Is getting 0x50 back from the X2 Bit setting valid ?

According to AN461 only bit 7 is valid, or rather is set for 12/6 clock mode. But i am seeing this returned as x50...

Any one have a clue if this matters ?

Thanks,
Lenny

TX -->  ":020000050003F6"
RX <--- ":020000050003F650."

**  READ : CLOCKBIT = 0x50