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
number from 1~10 decided by dialers’ memory sets.
Indirect (two-touch) memory
• To select Pulse or Tone mode.
• Off-hook (or Turn on HF function), push A, n key. The numbers that are stored in indirect memory location
“n” will be dialed out in Pulse or Tone mode as selection. The “n” expressed digital key from 0 to 9.
Pause (P) key operation
The Pause (P) key is designed to support pause operation in dialing duration. “P” key can be stored in memory
and it will occupy one digital position.
• To select Pulse or Tone mode.
• Off-hook (or turn on HF function), push d1, d2, .. , dn, RD/P, k1, k2, .. , kn . These numbers will be dialed
out as following sequence:
d1, d2, .. , dn, Tp, k1, k2, .. , kn.
Pulse to Tone (*/T or P-T) key operation
The Pulse to Tone (*/T or P-T) key is designed to support toll dialing (long distance call) or PABX system
operation. The "*/T (or P-T)" key can be stored in memory and it will occupy one digital position.
• To select Pulse mode.
• Off-hook (or turn on HF function), push d1, d2, .. , dn, */T, (or P-T) k1, k2, .. , kn. These numbers will be dialed
out as following sequence:
d1, d2, .. , dn, Tpt, k1, k2, .. , kn.
(pulse mode)
(tone mode)
Flash (F) key operation
The Flash (F) key is designed to break telephone line temporarily. After F key is depressed, this dialer will send
a flash signal to break line 600 ms, 300 ms, 100 ms or 80 ms as ROW3 and ROW4 selection.
Handfree (HF) function
The handfree function is designed to support on-hook dialing and loudspeaker application which can be turn “on”
or “off” with falling edge signal from HFI pin. During handfree function is executed, the HFO pin is switched
to “high”. Otherwise the HFO pin stays “low” level.
Truth table
Operating state
HKS
Input/Output pin level
PO XMUTE
PM
(0) On-hook, idle state
H
F
F
L
(1) Off-hook line
L
F
F
L
(2) Off-hook, HF line
L
F
F
L
(3) On-hook, HF line
H
F
F
L
Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level.
* This specification are subject to be changed without notice.
HFO
L
L
H
H
10.1.1997 6
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