EM91810A 데이터 시트보기 (PDF) - ELAN Microelectronics

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EM91810A

TONE/PULES SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

ELAN Microelectronics 

EM91810A/B

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

KEYBOARD ASSIGNMENT

C1 C2 C3

R1

1

23

R2

4

56

R3

7

89

R4 *or*/T 0 #

C4

P→T

F

P

RD

FUNCTIONAL BLOCK DIAGRAM

1). P→T : In pulse mode, execute P→T function.

2). F : Flash key.

3). RD : Redial key.

4). P : Pause key.

5). */T : In pulse mode, execte P→T function

In tone mode, execte "*" key.

COL1

COL2

COL3

COL4

OSCI

OSCO

ROW1

ROW2

ROW3

ROW4

OSC.

DIVIDER

OUTPUT INTERFACE CKT.

LNB MEMORY

INPUT INTERFACE CKT.

PULSE

GENERATOR

PO

DECODER &

DATA LATCH

ROW/COLUMN

PROGRAMMING

COUNTER

D/A CONVERTER

TONE

DIALING SIGNAL OPTION :

a]:Flash time:

Row3 Row4 flash time(ms)

NR NR

600

NR

R

300

R

NR

100

R

R

80

b).

Row1 Row2 MODE PULSE RATE M/B

R

NR TONE

R

R TONE

NR NR PULSE

20PPS

40:60

NR

R PULSE

20PPS

33:66

UR NR PULSE

10PPS

40:60

UR

R PULSE

10PPS

33:66

c]:Tone function:

Col1

NR

R

Tone Duration

98 ms

83 ms

inter-Tone

Pause

98 ms

83 ms

d]:Key type select

Col2

*or*/T

select

NR

* Note: NR:no resistance.

R : A resistance connect to Vss (820KΩ typically)

R

*/T

UR: A resistance connect to VDD

* This specification are subject to be changed without notice.

10.1.1997 2

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