ÉlanSC310 Microcontroller Evaluation Board User’s Manual
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Low Speed PLL Mode Column
• The CPU speed can be set to 4.61 Mhz, 2.30 Mhz, 1.15 Mhz, or 0.58 Mhz.
• The High Speed PLL can be enabled or disabled in this mode.
• The Low Speed PLL is always enabled for this mode.
• The state of the PMC pins for this mode mirror the setting in High Speed PLL
mode. Changing the state in this mode also changes the state for High Speed
PLL mode.
Doze Mode Column
• The CPU for this mode can be turned "OFF," or it can be enabled to run at
9.2 Mhz in response to IRQ0 being generated. "IRQ0-9.2Mhz" appears as the
matrix item. For this mode, the CPU only runs at 9.2 Mhz during the time IRQ0
is being processed. Setting this matrix item to "IRQ0+64 R" enables the CPU
to run at 9.2 Mhz while processing IRQ0 and the CPU remains running for 64
refresh cycles after IRQ0 processing is completed.
• The High Speed PLL is always disabled for this mode.
• The Low Speed PLL and Video PLL (controlled by the same bit) can be enabled
or disabled for this mode.
Sleep Mode Column
• The CPU is always off in this mode.
• The High Speed PLL is always off in this mode.
• The Low Speed PLL and Video PLL (controlled by the same bit) can be enabled
or disabled for this mode.
Suspend & Off Mode Column
• The CPU is always off in these modes.
• The High Speed PLL is always off in these modes.
• The Low Speed PLL and Video PLL (controlled by the same bit) can be enabled
or disabled for these modes.
evalbd.book : ch3 Page 7 Thursday, August 8, 1996 2:34 PM