EM91810B EMC [ELAN Microelectronics Corp], EM91810B Datasheet - Page 2

• Manufacturer Part Number: EM91810B
• Description: TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
• Manufacturer: EMC [ELAN Microelectronics Corp]

KEYBOARD ASSIGNMENT
FUNCTIONAL BLOCK DIAGRAM
DIALING SIGNAL OPTION :
* This specification are subject to be changed without notice.
a]:Flash time:
c]:Tone function:
Row3 Row4 flash time(ms)
R1
R2
R3
R4
NR
NR
R
R
Col1
NR
R
COL3
OSCI
OSCO
ROW1
ROW2
ROW3
ROW4
COL1
COL2
COL4
NR
NR
R
R
*or*/T
Tone Duration
C1
1
4
7
98 ms
83 ms
600
300
100
80
OSC.
C2
2
5
8
0
inter-Tone
DIVIDER
C3
Pause
3
6
9
#
98 ms
83 ms
P T
RD
C4
F
P
b).
d]:Key type select
INPUT INTERFACE CKT.
Row1 Row2
OUTPUT INTERFACE CKT.
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
NR
NR
UR
UR
Col2
R
R
NR
R
LNB MEMORY
1). P T : In pulse mode, execute P T function.
2). F
3). RD
4). P
5). */T
NR
NR
NR
*or*/T
select
R
R
R
*/T
*
PULSE
PULSE
PULSE
PULSE
MODE PULSE RATE
TONE
TONE
Note: NR:no resistance.
: Flash key.
: Redial key.
: Pause key.
: In pulse mode, execte P T function
In tone mode, execte "*" key.
UR: A resistance connect to V
R : A resistance connect to Vss
20PPS
20PPS
10PPS
10PPS
D/A CONVERTER
PROGRAMMING
DATA LATCH
ROW/COLUMN
GENERATOR
DECODER &
COUNTER
PULSE
40:60
33:66
40:60
33:66
M/B
TONE
PO
DD
(820K typically)
10.1.1997
EM91810A/B
2