DIGITAL SIGNAL PROCESSOR
S5L9284D
TRACKING COUNTER
This block is used to improve track-jump characteristics. The number of tracks, which must be jumped, is input from
micom, and the operating of the count is performed by the TRCNT pulse at the positiveedgeof MLT. If the number
of
tracks is loaded into the register and the CNTL-L is selected, the /COMPLETE signal is output to the /ISTAT
terminal,
and if the CNTL-U is selected, the /COUNT signal is output. The following is the timing chart of the tracking counter
block.
MLT
CNTL-L,U
N Tracking Count Data Loading
TRCNT
/ISTAT
=(/COUNT)
/ISTAT
=(/COMPLETE)
N
N
N
N
N
N
N
Figure 4. Tracking Counter Timing Chart
MDAT
MLT
CNTL State
/ISTAT
CNTL-L
/COMPLETE
CNTL-U
/COUNT
CNTL-C
/(PW > 64)
Other Mode
Hi-Z
Figure 5. /ISTAT Output Signal According to CNTRL Register
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