Z86E7216PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86E7216PSC' PDF : 74 Pages View PDF
Z86E72/E73
OTP IR Microcontrollers
COUNTER/TIMER REGISTER DESCRIPTION (Continued)
Power-On Reset (POR). A timer circuit clocked by a ded-
icated on-board RC oscillator is used for the Power-On Re-
set (POR) timer function. The POR time allows VCC and
the oscillator circuit to stabilize before instruction execu-
tion begins.
The POR timer circuit is a one-shot timer triggered by one
of three conditions:
1. Power Fail to Power OK status.
2. Stop-Mode Recovery (if D5 of SMR = 1).
3. WDT Time-Out.
The POR time is a nominal 5 ms. Bit 5 of the Stop-Mode
Register determines whether the POR timer is bypassed
after Stop-Mode Recovery (typical for external clock, RC,
LC oscillators).
XTAL1
XTAL1
XTAL1
C1
C1
C1
C1
Rf
L
R
XTAL2
XTAL2
C2
C2
XTAL2
C2
Rd
Ceramic Resonator or Crystal
C1, C2 = 47 pF TYP *
f = 8 MHz
* Preliminary value including pin parasitics
LC
C1, C2 = 22 pF
L = 130 µH *
f = 3 MHz *
RC
@ 3V VCC (TYP)
C1 = 33 pF *
R = 1K *
32 kHz XTAL
C1 = 20 pF, C = 33
pF
Rd = 56 - 470K
Rf =10 M
Figure 38. Oscillator Configuration
XTAL1
XTAL1
XTAL2
XTAL2
External Clock
1-48
PRELIMINARY
DS96LVO1100
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