Intel 80C196NU User Manual
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.
the XTAL1 input.
1
1
Quadrupled; clock quadrupling circuitry enabled. Internal clock is
four times the XTAL1 input.
four times the XTAL1 input.