¡ Semiconductor
MSM80C48/49/50, MSM80C35/39/40
PIN DESCRIPTIONS (Continued)
Symbol
XTAL1
(Crystal 1)
XTAL2
(Crystal 2)
V
CC
V
DD
V
SS
Type
I
O
—
—
—
Description
One side of the internal crystal oscillator. An external clock can also be input.
Other side of the internal crystal oscillator.
Power supply pin
Standby control input. Normally, "1" level. When set to "0" level, oscillation is
stopped and prosessor goes into standby mode.
GND
Note: A minimum of two machine cycles are required in
RESET
pulse duration under the
specified power supply and stable oscillator frequency.
5/20