
ÉlanSC310 Microcontroller Evaluation Board User’s Manual
3-8
1.
0
B: Force PMU State Transitions
ELAN PMU Evaluation Utility
Force PMU Modes
A: Force PMU to Low Speed PLL Mode
xxx
Mhz
B: Force PMU to Doze Mode
C: Force PMU to Sleep Mode
D: Force PMU to Suspend Mode
X: Return to Main Menu
Enter Selection=>/
Below this menu, the current PMU mode that the ÉlanSC310 microcontroller is in
is displayed along with any options set using option A from the main menu. For
modes where the CPU clock is running, the spinning activity cursor "/" helps show
the speed of the CPU.
A: Force PMU to Low Speed PLL Mode
xxxMhz
• The CPU Clock slows to the speed shown.
• If set up to do so, the High Speed PLL is shut off.
• Pressing any key or toggling the ACIN pin brings the system back to High Speed
PLL mode.
B: Force PMU to Doze Mode
• If the CPU clock speed is off, no spinning activity cursor is displayed.
• If the CPU clock is enabled for IRQ0 processing only, then the spinning activity
cursor transitions about once every 10 seconds.
• If the CPU clock is enabled for IRQ0+64 Refresh cycles, then the spinning
activity cursor spins.
• Pressing any key or toggling the ACIN pin brings the system back to High Speed
PLL mode.
C: Force PMU to Sleep Mode
• The keyboard is disabled in this mode. Pressing the Suspend/Resume key or
toggling the ACIN pin returns the system to High Speed PLL mode.
evalbd.book : ch3 Page 8 Thursday, August 8, 1996 2:34 PM