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參數(shù)資料
| 型號(hào)： | Z86C08 |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | CMOS 8-BIT LOW-COST 1K/2K-ROM MICROCONTROLLERS |
| 中文描述： | 的CMOS 8位的低費(fèi)用1K/2K-ROM微控制器 |
| 文件頁數(shù)： | 20/34頁 |
| 文件大?。?/td> | 207K |
| 代理商： | Z86C08 |
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Z86C04/C08
CMOS 8-Bit Low-Cost 1K/2K-ROM Microcontrollers
Zilog
20
P R E L I M I N A R Y
DS97DZ80502
PIN DESCRIPTION
(Continued)
Port 3
(P33-P31). Port 3 is a 3-bit, Schmitt-triggered
CMOS compatible port with three fixed input (P33-P31)
lines. These three input lines can be configured under soft-
ware control as digital inputs or analog inputs. These three
input lines can also be used as the interrupt sources IRQ0-
IRQ3 and as the timer input signal (T
IN
) (Figure 9).
Comparator Inputs.
Two analog comparators are added to
Port 3 inputs for interface flexibility. Typical applications for
these on-board comparators are: Zero crossing detection,
A/D conversion, voltage scaling, and threshold detection.
The dual comparator (common inverting terminal) features
a single power supply which discontinues power in STOP
mode. The common voltage range is 0-4V when the V
CC
is
5.0V.
Interrupts are generated on either edge of Comparator 2’s
output, or on the falling edge of Comparator 1’s output.
The comparator output may be used for interrupt genera-
tion, Port 3 data inputs, or T
through P31. Alternately, the
comparators may be disabled, freeing the reference input
(P33) for use as IRQ1 and/or P33 input.
Figure 8. Port 3 Configuration
D1
R247 = P3M
P31 (AN1)
P32 (AN2)
1 = Analog
0 = Digital
P31
Data Latch
IRQ, Tin
DIG.
AN.
+
-
+
-
Port 3
MCU
IRQ3
P32
Data Latch
IRQ0
Vcc
P33
Data Latch
IRQ1
IRQ 0,1,2 = Falling Edge Detection
IRQ 3 = Rising Edge Detection
PAD
PAD
PAD
P33 (REF)
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