¡ Semiconductor
MSM80C48/49/50, MSM80C35/39/40
PIN DESCRIPTIONS (Continued)
Symbol
Type
Description
XTAL1
I
One side of the internal crystal oscillator. An external clock can also be input.
(Crystal 1)
XTAL2
O
Other side of the internal crystal oscillator.
(Crystal 2)
VCC
VDD
—
—
Power supply pin
Standby control input. Normally, "1" level. When set to "0" level, oscillation is
stopped and prosessor goes into standby mode.
VSS
—
GND
Note: A minimum of two machine cycles are required in RESET pulse duration under the
specified power supply and stable oscillator frequency.
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