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4-4
PmPPC440: Real-Time Clock
April 2005
Calibration
Calibration bits. The calibration circuit adds or subtracts counts from the
oscillator divider circuit at the divide by 256 stage. The number of times
pulses are blanked (subtracted, negative calibration) or split (added, posi-
tive calibration) depends on this five-bit byte. Adding counts accelerates
the clock, and subtracting counts slows the clock down.
X
Don’t care bit.
Summary of Contents for PmPPC440
Page 1: ...PmPPC440 PowerPC Based Processor PMC Module User s Manual April 2005 ...
Page 3: ...PmPPC440 PowerPC Based Processor PMC Module User s Manual April 2005 ...
Page 14: ...viii PmPPC440 Contents ...
Page 34: ...2 14 PmPPC440 Setup April 2005 ...
Page 42: ...3 8 PmPPC440 PPC440GP Processor April 2005 ...
Page 56: ...6 4 PmPPC440 Ethernet Interface April 2005 ...