cxd2589q Sony Electronics, cxd2589q Datasheet - Page 37

• Manufacturer Part Number: cxd2589q
• Description: Cd Digital Signal Processor
• Manufacturer: Sony Electronics

CXD2589Q
Timing Chart 2-3
Measurement interval (approximately 3.8µs)
Reference window
(132.2kHz)
Measurement pulse
(VCKI/2)
Measurement counter
Load
m
VF0 to 7
The relative velocity R of the disc can be expressed with the following equation.
m + 1
R =
(R: Relative velocity, m: Measurement results)
32
VF0 to 7 is the result obtained by counting VCKI/2 pulses while the reference signal (132.2kHz) generated
from the crystal (384Fs) is high. This count is 31 when the disc is rotating at normal speed and 63 when it is
rotating at double speed (when DSPB is low).
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