Z02205 Datasheet, PDF (26/30 Pages) Zilog, Inc. – MODEM CONTROLLER IDEAL FOR LOW POWER CONSUMPTION, SMALL SIZE REQUIREMENTS

Z02205
Modem Controller
C1
VSS**
XTAL1
C2
VSS**
XTAL2
Ceramic Resonator or Crystal
C1, C2 = 22 pF TYP*
f = 8 MHz
*Preliminary value including pin parasitics
**Device ground pin
Figure 5. Oscillator Configuration
Power-On-Reset (POR). A timer circuit, clocked by a ded-
icated on-board RC oscillator, is used for the POWER-ON
RESET (POR) timer function. The POR time allows V_&& and
the oscillator circuit to stabilize before instruction execution
begins.
The POR timer circuit is a one-shot timer triggered by one
of four conditions:
‡ Power fail to Power OK status.
‡ STOP-MODE RECOVERY (if bit D5 of SMR is set to 1).
‡ WDT time-out.
‡ The POR time is a specified as TPOR.
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ZiLOG
PS001000-MOD0599