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參數(shù)資料
| 型號： | EM91455BP |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| 中文描述： | 音頻/脈沖撥號與LCD接口及IPP檢測功能 |
| 文件頁數(shù)： | 3/24頁 |
| 文件大?。?/td> | 199K |
| 代理商： | EM91455BP |
EM91455 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
3
* This specification are subject to be changed without notice.
9.24.1998
FUNCTIONAL BLOCK DIAGRAM
PIN DESCRIPTIONS
Symbol
Function
ROW1~ROW4
Keyboard scan pins of row group. In idle state (HKS is “High” and HFO is “Low”),
these pins stay “High impedance” level to prevent power consumption. Otherwise,
these pins switch to “High” level for detecting keyboard entry. These pins will output
600 Hz signal while keyboard is scanning.
Keyboard scan pins of column group. In idle state, these pins stay “High impedance”
level. Otherwise these pins switch to “Low” level for detecting keyboard entry. These
pins will output 600 Hz signal while keyboard is scanning.
The fourth column group pin of the keyboard that also provides the keytone output
. Normally, this pin stays “Low” level for detecting keyboard entry. After a valid
keyboard entry, this pin will output keying confirmation tone that is 600 Hz signal and
30 ms duration. To prevent signal interference, while DTMF issue, it will disable key
tone output except function key.
Oscillator input and output pins. A 3.579545 MHz crystal or ceramic resonator must
be crossed connection to XIN and XOUT pins which generate system clock.
Input/Output structure pin. The output is a open drain structure. Input is schmitt trigger
structure. This pin will be input pin during ON-HOOK status for illegal parallel phone
detect input pin and will be output pin in OFF-HOOK condition for control speech
network.
Positive and negative power supply input pins. Recommended operating voltage from
2.0Vdc to 5.5Vdc.
Handfree inputs pin which accepts falling edge signal to turn “on” or turn “off”
handfree function. This pin is hysteresis input structure and built-in pull up resistor
(typically 200 Kohms).
Handfree outputs pin that is designed to control telephone line for on-hook dialing or
control speakerphone circuit for handfree conversation. When handfree function is
executed, this pin will switch to“High”. Otherwise, this pin stays “Low” level.
The DTMF (Dual Tone Multi-Frequency) and music signals output pin. Normally,
this pin stays “Low” level. In Tone dialing mode, this pin will output DTMF signal
that is corresponding to keyboard 0 .. 9, * and # keys.
COL1~COL3 and COL5
COL4/KT
XIN and XOUT
XMUTE
V
DD
and V
SS
HFI
HFO
DTMF
COL1
COL2
COL3
COL4/KT
COL5
XIN
XOUT
ROW1
ROW4
HFOHDO
XMUTE
Keyboard
interface
(column)
Oscillator
Keyboard
interface
(Row)
Output circuit
Memory
Timing/Control circuit
Input circuit
Pulse
generator
latch
&
decoder
D/A
converter
Row/Column
programming counter
DTMF
PO
HKS
HFI
VDD
DRING
RMUTE
SDO
~
I/O circuit
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PDF描述 |
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| EM91455C | IC XTAL CLK 0SC 16.0 MHZHYBRID +/-.01% |
| EM91455CK | TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91455D | TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91455DK | TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91455 | Tone/Pulse Switchable Dialer with LCD Interface and I.P.P. Detect Function(雙音/脈沖可轉(zhuǎn)換撥號器（帶液晶顯示接口和盜撥檢測功能）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM91455C | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91455CK | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91455D | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91455DK | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
| EM91465 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION |
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