Intel 8XC196NP, 80C196NU, Microcontroller manual PLLEN21, Multiplier State Time

8XC196NP, 80C196NU USER’S MANUAL

Table 2-3. Relationships Between Input Frequency, Clock Multiplier, and State Times

FXTAL1	PLLEN2:1	Multiplier	f	t	State Time
(Frequency			(Input Frequency to	(Clock
on XTAL1)			the Divide-by-two Circuit)	Period)
50 MHz †	00	1	50 MHz	20 ns	40 ns
25 MHz	00	1	25 MHz	40 ns	80 ns
	10	2	50 MHz	20 ns	40 ns
	00	1	12.5 MHz	80 ns	160 ns
12.5 MHz	10	2	25 MHz	40 ns	80 ns
	11	4	50 MHz	20 ns	40 ns

†Assumes an external clock. The maximum frequency for an external crystal oscillator is 25 MHz.

	TXHCH
XTAL1
(12.5 MHz)
f
PLLEN2:1=00	t = 80ns
CLKOUT
f
PLLEN2:1=10	t = 40ns
CLKOUT
f
PLLEN2:1=11	t = 20ns
CLKOUT
	A3160-01

Figure 2-6. Effect of Clock Mode on CLKOUT Frequency

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