ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 191

• Manufacturer Part Number: ez80190
• Description: Ez80190 Microprocessor
• Manufacturer: ZiLOG Semiconductor

Crystal Oscillator
PS006613-0306
Note: *These values are typical values only. Actual values must be tuned for the crystal and the
frequency of operation.
The eZ80190 device features an on-chip crystal oscillator that supplies clocks to
the internal eZ80
cuitry uses the three dedicated pins X
The external clock/oscillator (X
may be used to interface the internal oscillator to an external oscillator (see
Figure
parallel resonant crystal.
X
nects the internal crystal oscillator to an external crystal oscillator. If an external
clock is used, X
high-speed system clock, may be used to synchronize other peripherals to the
eZ80190 device system clock.
10pF*
10pF*
IN
C1
C2
can also accept a CMOS-level clock input. The oscillator output (X
35). Typical circuit parameters are C1 = C2 = 10 pF and R = 1 MΩ using a a
OUT
®
CPU core, to peripherals, and to the external pin. The clock cir-
Figure 35. Crystal Oscillator
should be left unconnected. The PHI pin, which drives the
PRELIMINARY
IN
) input features two clock-generation options. X
1MΩ*
R
IN
, X
OUT
X
X
IN
OUT
, and PHI.
eZ80190 Product Specification
eZ80190
Crystal Oscillator
OUT
) con-
IN
177