MCF52223 ADC

[Archaiwy]

Hello everybody,

When i use mcf52223 adc to do my work, i noticed that the "MCF52223 ColdFire® Integrated Microcontroller Reference Manual" page 25-33 tells the ADC clock is gated by ADC bit of SIM_PCE register of SIM module. But I can not find the description on SIM_PCE register. Is it an error or useless register. Does it affect the ADC operation?

Thanks millions on any hints

best regards,

[RichTestardi]

From other Freescale manuals, I believe the register being described is:

Finally, the SIM_PCE register contains a bit per peripheral to enable clocking to that peripheral. This is useful for power management. These controls are referenced in peripheral-related restrictions later in this document.

Which would actually be the CDADC bit of PPMRH in the 52223 (section 6.2.1).  The clock is enabled (i.e., not disabled) by default.

This (documentation error) is also speculated here:

http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&thread.id=4246