Z86L02 datasheet(18/37 Pages) ZILOG

18 / 37 page

Z86C02/E02/L02

Cost Effective, 512-Byte ROM CMOS Z8® Microcontrollers

Zilog

P R E L I M I N A R Y

DS96DZ80301

PIN FUNCTIONS (Continued)

Port 3, P33-P31. Port 3 is a 3-bit, CMOS compatible port

with three fixed input (P33-P31) lines. These three input

lines can be configured under software control as digital

Schmitt-trigger inputs or analog inputs.

These three input lines are also used as the interrupt

sources IRQ0-IRQ3 and as the timer input signal TIN (Fig-

ure 10).

Comparator Inputs. Two analog comparators are added

to input of Port 3, P31 and P32, for interface flexibility. The

comparators reference voltage P33 (REF) is common to

both comparators.

Typical applications for the on-board comparators; Zero

crossing detection, A/D conversion, voltage scaling, and

threshold detection. In analog mode, P33 input functions

serve as a reference voltage to the comparators.

The dual comparator (common inverting terminal) features

a single power supply which discontinues power in STOP

mode. The common voltage range is 0-4 V when the VCC

is 5.0 V; the power supply and common mode rejection ra-

tios are 90 dB and 60 dB, respectively.

Interrupts are generated on either edge of Comparator 2's

output, or on the falling edge of Comparator 1's output.

The comparator output is used for interrupt generation,

Port 3 data inputs, or TIN through P31. Alternatively, the

comparators can be disabled, freeing the reference input

(P33) for use as IRQ1 and/or P33 input.

Figure 10. Port 3 Conﬁguration

Port 3

R247 = P3M

P31 (AN1)

P32 (AN2)

P33 (REF)

DIG.

AN.

TIN

P31 Data Latch

IRQ2

IRQ3

P32 Data Latch

IRQ0

P33 Data Latch

IRQ1

PAD

0 = Digital

1 = Analog

IRQ 0,1,2 = Falling Edge Detection

IRQ3

= Rising Edge Detection

Z86L02 датащи(PDF) 18 Page - Zilog, Inc.

Z86L02 датащи(HTML) 18 Page - Zilog, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

датащи скачать

ссылки URL