EM91240AP EMC [ELAN Microelectronics Corp], EM91240AP Datasheet - Page 4

• Manufacturer Part Number: EM91240AP
• Description: TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
• Manufacturer: EMC [ELAN Microelectronics Corp]

FUNCTION DESCRIPTIONS
* This specification are subject to be changed without notice.
Normal dialing
Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory
automatically. Operating procedure described as follow :
• To select Pulse or Tone mode.
• Off-hook or turn on HF function.
• Keying d1, d2, .. , dn. The “d” expressed digital keypad that included 1~9, *, 0, #, P, and P T keys. The “n”
• The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.
LNB redial memory
Storing:
Redialing:
SAVE redial memory
Dialing signal selection
expressed unlimited.
In normal dialing mode, every digital key was entry which number will be stored in LNB memory
automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled.
Otherwise, these numbers stored in LNB memory can be redial output.
After normal dialing, directly keying F key (or On-Off hook once) and keying RD key on keyboard. The
numbers that are stored into LNB memory will be dialed output.
The SAVE meomry is designed in EM91240 series to support 32 digits capacity buffer for second redial,
The EM91240 series incorporated a special keyboard scanning function that is connecting a resistor (typically
is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described
as following :
a. Mode
c. Flash time
e. Pause time and P-T wait time
ROW1
ROW3
R-Vdd
R-Vss
R-Vss
R-Vss
COL2
R-Vss
NR
NR
NR
NR
Tp (sec)
20 PPS
10 PPS
ROW4
R-Vss
R-Vss
Mode
Tone
NR
NR
3.6
2.0
Tpt (ms)
Tf (ms)
600
100
300
3.6
2.0
80
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
b. M/B ratio
d. DTMF signal
f. Keyboard operate type
ROW2
R-Vdd
R-Vss
COL1
R-Vss
NR
NR
COL3
R-Vss
NR
MBR (%)
40:60
33:66
Td (ms)
90
83
98
Type
A
B
Titp (ms)
90
98
83
EM91240 SERIES
10.1.1997
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