Sscg Control Registers - NEC V850E/Dx3 Preliminary User's Manual

Chapter 4
Reconfiguration of
SSCG registers
144
Downloaded from Elcodis.com electronic components distributor

4.2.2 SSCG control registers

This section describes the registers used for controlling the spread spectrum
Clock Generator SSCG.
For modulating the SSCG output clock it's dithering mode must be enabled by
CKC.DEN = 1.
The SSCG control registers SCFC0, SCFC1 and SCFMC can only be rewritten
with new settings if the SSCG is switched off, i.e. if
• the SSCG is disabled by CKC.SCEN = 0
• the SSCG is safely switched off after a power save mode wake-up. Refer to
"CPU operation after power save mode release" on page 181 for a
procedure to ensure that the SSCG is switched off after wake-up.
During operation of the SSCG the registers may only be rewritten with the
values, they already have.
Preliminary User's Manual U17566EE1V2UM00
Clock Generator