Datasheet

Aalap Tripathy, 2004P3PS208
PSOC Lab, BITS Pilani Goa Campus
38
20. Global Resources Settings
• 32K_Select and PLL_Mode at
Internal and Disable
• We are not using an external
crystal to drive the processor nor
need anything to sync it to.
• CPU_Clock=SysClock/8
(=3MHz)
• VC1=1 (We don’t need this)
• VC2=1
• VC3 Source = SysClk/1 (Default)
• VC3 Divider=1
• Every other parameter default
• Notes : The "best" speed to set the
CPU for experimental use is 12MHz.
That is the maximum speed over the
full voltage range (using 24MHz
requires >4.75V). If projects require
minimum power, they can have their
CPU speed reduced after it gets
working.
• Jeff recommends using VC1, VC2 or
VC3 as the source for the clock for the
square wave instead of the 32k Clock.
• Generally, when clocks are not being
used, they should be set to the lowest
frequency (e.g. VC1 = 16, VC2 = 16,
VC3 Source = VC2, VC3 = 256). This
will use the least power.
(All Default)