82C85 Datasheet, PDF (15/21 Pages) Intersil Corporation – CMOS Static Clock Controller/Generator

Timing Waveforms (Continued)
82C85
EFI
CLK
CLK50
PCLK
S0
S1
S2/STOP
RES
START
(23) TSTART
FIGURE 11. CLOCKS START (F/C HIGH)
START
X1
CLK
(21)
TSHSL
(39)
TOST
CRYSTAL
OSCILLATOR
STARTUP TIME
8192 CYCLES
CLK50
PCLK
FIGURE 12. CLOCK START (F/C LOW)
NOTE: Start up count begins when the crystal oscillator reaches a suitable threshold level.
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