參數(shù)資料
型號(hào)： P83C834CFP
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-bit microcontrollers with LCD-driver
中文描述： 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44
封裝： 10 X 10 MM, 1.75 MM HEIGHT, PLASTIC, SOT-307-2, QFP-44
文件頁(yè)數(shù)： 29/36頁(yè)
文件大?。?/td> 165K
代理商： P83C834CFP
1997 Jul 03
29
Philips Semiconductors
Product specification
8-bit microcontrollers with LCD-driver
P83C434; P83C834
12 APPLICATION INFORMATION
Figure 19 shows a typical portable/personal radio system
application which uses the device in conjunction with the
Self Tuned Radio (STR) TEA5757. This application
provides the following functions:
Scanning the keypad
Transfer of commands and information to and from the
rest of the radio system
Display of information on a LCD
Storage of preset frequencies
Real Time Clock (not always required).
Control between the TEA5757 and the microcontroller is
performed by a 4 line interface bus.
The advantage of the TEA5757 is that it works
independently from the microcontroller, e.g. once tuned to
a station, the microcontroller could be removed and the
tuner stays tuned.
The system is designed such that the microcontroller is
switched to Power-down mode when no actions are
required; this increases the lifetime of the batteries.
The microcontroller is activated by an interrupt, e.g. when
a key on the keyboard is pressed, or by the 1 second timer
(updating the real-time clock function). After the
appropriate actions are taken the microcontroller will enter
the Power-down mode again.
Fig.19 Application diagram with the STR (TEA5757).
handbook, full pagewidth
MSB622
TUNER
F/E
IF AMP/DET.
MPX
SYNTH.
TEA5757H
HEADPHONE
AMPLIFIER
TDA8542(T),
TDA7050(T)
or
TDA1308T
L
R
volume
KEYPAD
MICROCONTROLLER
P83Cx34
LCD DISPLAY
L
R
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