EM91215 查看數據表（PDF） - ELAN Microelectronics
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EM91215 Datasheet PDF : 19 Pages
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EM91215 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
FUNCTION DESCRIPTIONS
Dialing signal selection
The EM91215 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
ROW1 Mode
R-Vdd 20 PPS
NR
Tone
R-Vss 10 PPS
c. Flash time
ROW3 ROW4 Tf (ms)
NR
NR
600
NR
R-Vss
100
R-Vss
NR
80
R-Vss R-Vss
300
e. Pause time and P-T wait time
COL2 Tp (sec) Tpt (ms)
NR
3.6
3.6
R-Vss
2.0
2.0
g. ROW5/SDO pin functions
COL5 ROW5/SDO pin
NR
SDO
R-Vss
ROW5
Normal dialing
b. M/B ratio
ROW2 MBR (%)
NR
40:60
R-Vss
33:66
d. DTMF signal
COL1
Td (ms)
R-Vdd
90
NR
98
R-Vss
83
Titp (ms)
90
98
83
f. Keyboard operate type
COL3
Type
NR
A
R-Vss
B
(Note): The option of COL5 pin is only for EM91215.
If select SDO function, the memory type is
(1T*3+2T*10)
If select ROW5 function, the memory type is
(1T*3+2T*10) and (1T*13)
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”
expressed unlimited.
• The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.
LNB redial memory
Storing:
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.
Redialing:
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.
* This specification are subject to be changed without notice.
10.1.1997 4
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