HM91710A EMC [ELAN Microelectronics Corp], HM91710A Datasheet - Page 4

• Manufacturer Part Number: HM91710A
• Description: TONE/PULSE SWITCHABLE DIALER
• Manufacturer: EMC [ELAN Microelectronics Corp]

FUNCTION DESCRIPTION
FUNCTION DESCRIPTION
FUNCTION DESCRIPTION
FUNCTION DESCRIPTION
FUNCTION DESCRIPTION
* This specification are subject to be changed without notice.
Symbol
Symbol
Symbol
Symbol
Symbol
Keyboard Operation
Keyboard Operation
Keyboard Operation
Symbol definitions:
Symbol definitions:
Symbol definitions:
Keyboard Operation
Keyboard Operation
Symbol definitions:
Symbol definitions:
TONE
HFI
HFO
a).
b).
c). D
d). D
e). D
f). t
g). t
h). t
i). t
j). t
k). LNB
A. Normal Dialing
A. Normal Dialing
A. Normal Dialing
A. Normal Dialing
A. Normal Dialing
1. Digit Dialing
FP
F
RP
P
PT
1
t1
.....D
P1
....D
Procedure :
Dial out
Dial out
LNB
... D
Dual Tone Multi-frequency output pin.
In TONE mode, when a entry of digit key (include * , # key), this pin will sent out a corresponding
DTMF signal.
The TONE pin provides minimum tone duration (t
key-in. If key-in time is less than t
last as long as the key is pressed.
Handfree input control pin.
Toggle input sturcture, falling edge trigger.
It is used to enable and disable Handfree function.
With waveshaped by a built-in Schmit trigger, the bounce of input can be eliminated by external R,
C debounce circuit.
A built-in pull up resistor is 200K typical.
Handfree output pin.
Inverter output structure (normally "low", active "high").
When a HFI pin is active, Handfree function will be enabled (HFO=1) or disabled (HFO=0).
When the Handfree function is enable (HFO=1), after OFF-HOOK action, it can reset Handfree
function and HFO pin return to "low" state.
tn
n
Pn
: OFF-HOOK or enable Hand Free function.
: ON-HOOK or disable Hand Free function.
: Digit key; 1,2,3,4,5,6,7,8,9,0,*,# (C
: Pulse digit ; 1,2,3,4,5,6,7,8,9,0, (C
: Tone digit ; 1,2,3,4,5,6,7,8,9,0,*, # (C
: Flash time.
: Pause time.
: Pulse to Tone wait time.
: Pause time for flash.
: Pause time for redial.
: Last number redial buffer.
: Dt1, Dt2 . . . . . . ., Dtn in tone mode
: Dp1, Dp2 . . . . . ., Dpn in pulse mode
: D1, D2 . . . . . . Dn
D1,D2 . . . . . ., Dn
TD
, DTMF signal will last for t
P1
1
... C
.....C
Function
Function
Function
Function
Function
t1
....C
Pn
n
is same as D
is same as D
tn
TD
is same as D
),& minimum intertone pause time to support rapid
TONE/PULSE SWITCHABLE DIALER
TONE/PULSE SWITCHABLE DIALER
TONE/PULSE SWITCHABLE DIALER
TONE/PULSE SWITCHABLE DIALER
TONE/PULSE SWITCHABLE DIALER
P1
1
.....D
... D
t1
....D
TD
Pn
n
, otherwise the tone duration will
).
).
tn
).
HM
HM91710A/B
HM
HM
HM
1.7.2002
91710A/B
91710A/B
91710A/B
91710A/B
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