MC908KX2MDWE Datasheet, PDF (90/210 Pages) Freescale Semiconductor, Inc – High-performance M68HC08 architecture, Fully upward-compatible object code with M6805, M146805, and M68HC05 Families

Internal Clock Generator Module (ICG)
DSTG7:DSTG0 — ICG DCO Stage Control Bits
These bits indicate the number of stages (above the minimum) in the digitally controlled oscillator. The
total number of stages is approximately equal to $1FF, so changing DSTG from $00 to $FF will
approximately double the period. Incrementing DSTG will increase the period (decrease the
frequency) by 0.202% to 0.368% (decrementing has the opposite effect). DSTG cannot be written
when ICGON is set to prevent inadvertent frequency shifting. When ICGON is set, DSTG is controlled
by the digital loop filter. Since the DCO is active during reset, reset has no effect on DSTG and the
value may vary.
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
90
Freescale Semiconductor