upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 144

Manufacturer Part Number

upd70f3422gj-gae-qs-ax

32-bit Single-chip Microcontroller

Manufacturer

Renesas Electronics Corporation.

Reconfiguration of

SSCG registers

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

During operation of the SSCG the registers may only be rewritten with the

values, they already have.

Preliminary User’s Manual U17566EE1V2UM00

“CPU operation after power save mode release” on page 181 for a

procedure to ensure that the SSCG is switched off after wake-up.

Clock Generator