Z86E0812PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86E0812PSC' PDF : 44 Pages View PDF
Z86E04/E08
CMOS Z8 OTP Microcontrollers
Zilog
PIN FUNCTIONS (Continued)
XTAL1, XTAL2 Crystal In, Crystal Out (time-based input
and output, respectively). These pins connect a parallel-
resonant crystal, LC, or an external single-phase clock
(8 MHz or 12 MHz max) to the on-chip clock oscillator and
buffer.
Port 0, P02-P00. Port 0 is a 3-bit bidirectional, Schmitt-trig-
gered CMOS-compatible I/O port. These three I/O lines
can be globally configured under software control to be in-
puts or outputs (Figure 7).
Auto Latch. The Auto Latch puts valid CMOS levels on all
CMOS inputs (except P33, P32, P31) that are not external-
ly driven. A valid CMOS level, rather than a floating node,
reduces excessive supply current flow in the input buffer.
On Power-up and Reset, the Auto Latch will set the ports
to an undetermined state of 0 or 1. Default condition is
Auto Latches enabled.
Z86E04
and
Z86E08
Port 0 (I/O)
Open
Out
1.5
2.3 Hysteresis VCC @ 5.0V
In
R 500 kΩ
Figure 7. Port 0 Configuration
PAD
Auto Latch Option
20
PRELIMINARY
DS97Z8X0401
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