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12-13
SPECIAL OPERATING MODES
Table 12-3. 80C196NU Clock Modes
PLLEN2 PLLEN1 Mode
0 0 Clock-multiplier circuitry disabled.
0 1 Reserved.
CAUTION: This combination causes the device to enter an
unsupported test mode.
1 0 Doubled; clock doubling circuitry enabled. Internal clock is twice
the XTAL1 input.
1 1 Quadrupled; clock quadrupling circuitry enabled. Internal clock is
four times the XTAL1 input.