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參數(shù)資料
| 型號： | EM94014 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | Dual Channel Cordless Phone Controllers with Handset LCD Display(雙通道無繩電話控制器（帶手機LCD顯示）) |
| 中文描述： | 雙通道控制器無繩電話與手機液晶顯示器（雙通道無繩電話控制器（帶手機液晶顯示）） |
| 文件頁數(shù)： | 5/16頁 |
| 文件大小： | 135K |
| 代理商： | EM94014 |
5
* This specification are subject to be changed without notice.
1.30.1997
EM94014/EM94015
DUAL CHANNEL CORDLESS PHONE CONTROLLERS
WITH HANDSET LCD DISPLAY
BASE UNIT(EM94015)
Symbol
DATO
I/O Active
O
(P.P.)
Function
H
Data output.
It sends the digital data of dialing and commands to the base unit. The base unit
should invert this signal firstly before sending to base’s /DATI pin.
Low output to enable speaker function and high to disable.
/SPKEN
O
L
(O.D.)
O
(O.D.)
O
(P.P.)
I
/MICEN
L
Low output to enable microphone function and high to disable
INUSE
H
High output to indicates in-use, ringing.
Low output for standby and off mode.
Charge detection input.
Low input indicates charging mode. It is used for system alignment when the
handset is placed back to the charge cradle. It needs about 2 seconds for the
alignment.
Data input.
The data sent from the sending-end where is inverted to the receiving-end that it
means to receive the inverted signal sent from the handset’s DATO pin.
To prevent IC malfunction from RF noise, a low filter (cut off freq. ~1kHz) must
be added, see Note 2.
A low signal sent to this pin will force the controller to start sampling the received
data.
Generate ringing, paging tone, etc.
/CHG
L
/DATI
I
L
BEEP
O
H
(O.D.)
O
DTMF
H
Dual Tone Multiple Frequencies signal output
In base unit dialing, the DTMF signal is generated as long as the key is pressed. For
handset dialing and speed dialing, the DTMF signal complies with minimum tone
duration (90ms) and minimum inter-tone pause (90ms).
No connection.
NC
For the DATI pin connection with the RF receiver, the following circuitry is needed :
Figure 1. Low pass filter interface
NOTE : 1
: If /ENLCD and SDO pins are not used, it should be pulled up to V
DD
to avoid floating for
power saving.
: Push Pull
: Input
: Open Drain, pull-up resistor is required.
P.P.
I
O.D.
NOTE : 2
Receiver
Voice out
Low pass filter
(~1KHz cutoff freq.)
Wave Shaping
/DATI
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