Z8615 Datasheet, PDF (9/10 Pages) Zilog, Inc. – NMOSZ8 8-BITMCU KEYBOARD CONTROLLER

Z8615
CPS DC-4143-05
TEST CONDITIONS AND METHODOLOGY
7.3 A socket can be soldered into the keyboard to
expedite measurements of different units. But
initial correlation of how much shift (relative to
directly soldering) the socket induces must be
done on a reference unit. It is desireable to use a
unit that operates at the center of the frequency
range when directly soldered on the UTB.
8. Analyzer Set-Up for Timing Measurements:
8.3 The last remaining step to do before viewing a set
of signals is to define the display sequence for the
channels defined in step 8.1. To get into the
display window, depress <Wave-Form>, then do
the following sequence:
1. Move the cursor to the left side of the screen,
then move it down as far as it will go, then depress
<Select>.
8.1 In order for the analyzer to work, the analyzer
channels must first be defined/formatted. To begin
this process, depress the <Format> button, then
perform the following sequence:
1. Move the cursor down to the last position on the
left of LABEL, then depress <Select>.
2. Type in the appropriate name for this entry, then
depress <Done>.
3. Move the cursor to the POD A1 group which is
to the right of the entry just defined, then depress
<Select>.
4. Move the cursor to the right until the cursor is
located on the desired channel number, then
depress <Done>.
5. To define another channel, repeat the sequence.
8.2 To properly get the analyzer to display, a trigger
edge needs to be defined. To do this, depress
<Trigger>, then continue the following sequence.
1. If the analyzer is just powered-up, this menu will
indicate that trigger edge "a" is selected. Move the
cursor down to label "a," then depress <Select> to
define its logic.
2. Select the signal to display by moving the cursor
up/down the list of defined signals. Once the
desired signal is highlighted, press <Done>.
3. To start the display, move the cursor to the RUN
option (upper right corner of the screen), then
depress <Select>. Move the cursor to highlight
SINGLE or REPETITION for a single trigger or a
recurrent trigger, then depress <Done>.
9.0 POR Measurement:
9.1 Apply a square wave (amplitude = 4 volts),
frequency ~ .5 Hertz, and rise/fall times greater
than 8V/usec) to RESET (Pin 6).
9.2 Connect one of the analyzer probes to data
strobe (Pin 8) and another to RESET (Pin 6) goes
high to when data strobe (Pin 8) goes high.
9.3 To get a consistent image on the analyzer, it
should be triggered on an edge of the signal
driving reset terminal. The POR delay is defined as
the time when reset (Pin 6) goes high to when data
strobe (Pin 8) goes high.
9.4 Remember to connect the analyzer ground to
the UTB ground.
2. Move the cursor to the right beneath RESET
(one of the signals used to pull the reset pin low on
the 8615), depress <Select>, type "1," then depress
<Done>.
3. Move the cursor to the right beneath POR
(another signal which goes low when RESET goes
low and goes high ~ 120 ms after RESET goes
high), depress <Select>, type "1," then depress
<Done>.
4. To define the logic for another trigger edge,
follow the above sequence for another trigger
label.
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