DS80C320-ECD DALLAS [Dallas Semiconductor], DS80C320-ECD Datasheet - Page 29

• Manufacturer Part Number: DS80C320-ECD
• Description: High-Speed Microcontroller User Guide
• Manufacturer: DALLAS [Dallas Semiconductor]

RGSL
Bit 1
BGS
Bit 0
Ring Oscillator Select. This bit selects the clock source following a resume
from Stop mode. Using the ring oscillator to resume from Stop mode allows
almost instantaneous start-up. This bit is cleared to 0 after a power-on reset, and
unchanged by all other forms of reset. The state of this bit will be undefined on
devices which do not incorporate a ring oscillator.
0 = The device will hold operation until the crystal oscillator has warmed-up.
1 = The device will begin operating from the ring oscillator, and when the crystal
warm-up is complete, will switch to the clock source indicated by the XT/
bit.
Band-gap Select. This bit enables/disables the band-gap reference during Stop
mode. Disabling the band-gap reference provides significant power savings in
Stop mode, but sacrifices the ability to perform a power fail interrupt or power-
fail reset while stopped. This bit can only be modified with a Timed Access
procedure. The state of this bit will be undefined on devices which do not
incorporate a band-gap reference.
0 = The band-gap reference is disabled in Stop mode but will function during
normal operation.
1 = The band-gap reference will operate in Stop mode.
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High-Speed Microcontroller User’s Guide
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