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PDF W91550DN Data sheet ( Hoja de datos )

Número de pieza W91550DN
Descripción 13-MEMORY TONE/PULSE DIALER WITH LCD AND LOCK FUNCTION
Fabricantes Winbond 
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W91550DN SERIES
13-MEMORY TONE/PULSE DIALER
WITH LCD AND LOCK FUNCTIONS
GENERAL DESCRIPTION
The W91550DN series are Si-gate CMOS IC tone/pulse switchable dialers containing 13 number
memories and a 10-digit LCD driver for displaying telephone numbers and calling time, including a
16-digit × 3 one-touch memory, 16-digit × 10 two-touch memory dialing, and 32-digit × 2 redial and
save memory. These dialers also provide a secrecy key, flash, two-way handfree dialing, one-key
redial, hold and lock functions.
FEATURES
Tone/pulse switchable dialer
Two by 32-digit redial and save memory (or mercury memory)
Three by 16-digit one-touch direct repertory memory
Ten by 16-digit two-touch indirect repertory memory
Memory check function
Save/mercury function selected by pin option
Typical interdigit pause (IDP): 800 msec (10 ppS) in pulse mode
Uses 4 × 7 keyboard
Mute key for secrecy control
Minimum tone output duration/inter-tone pause: 87/87 mS
Flash pause time: 1.2 sec.
Flash break time (98, 300, 600 msec) selectable by keypad
Pause time (2.0, 3.6, 4.0 sec.) selectable by mask option
Pulse-to-tone (*/T) keypad for long distance call operation
0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out
Make/break ratio selected by pin option
Built-in 10-digit LCD driver for telephone number display and calling time (1/3 duty, 1/2 bias)
Built-in calling time from (00:00) to (59:59)
On-chip power-on reset and clear LCD
On hook debounce: 250 msec in normal mode (20 msec in lock mode)
First key-in delay: 300 msec in lock mode
Uses 3.579545 MHz crystal or ceramic resonator
Packaged in 64-pin QFP
The different dialers in the W91550DN series are shown in the following table:
TYPE NO.
W91550DNF
W91550DNF-1
W91550DNH
W91550DNH-1
FUNCTION
Default pause time is 3.6 sec. and all F1, F2, F3 are first priority.
Same as W91550DN except F3 can be stored as a digit.
Default pause time is 3.6 sec. and all F1, F2, F3 are first priority.
Same as W91550DN except F3 can be stored as a digit.
PACKAGE
QFP
QFP
Chip
Chip
Publication Release Date: November 1998
- 1 - Revision A3

1 page




W91550DN pdf
W91550DN SERIES
Pin Description, continued
SYMBOL PIN
HFI , HFO 57, 58
LOCK
64
I/O FUNCTION
I, O Handfree control pins. A low pulse on the HFI input pin toggles the
handfree control state.
Status of the handfree control is listed in the following table:
CURRENT STATE
Hook SW.
HFO
Low
On Hook
High
Off Hook
High
On Hook
Off Hook
Low
Off Hook
High
NEXT STATE
Input
HFO
HFI High
HFI
HFI
Off Hook
On Hook
Low
Low
Low
Low
On Hook
High
Dialing
Yes
No
Yes
Yes
No
Yes
HFI pin is pulled to VDD by internal resistor.
Detailed timing diagram is shown in Figure 4.
I The LOCK pin is used to prevent "0" or "9" dialing under PABX
system long distance call control. When the first key input after reset
is "0" or "9", all the key inputs, including "0" or "9" key, become
invalid, and the chip generates no output.
The telephone is reinitialized by a reset.
The following table describes the functions of the LOCK pin:
LOCK PIN
Floating
VDD
VSS
FUNCTION
Normal dialing
"0", "9" dialing inhibited
"0" dialing inhibited
TEST
VLCD
CP, CN
37
59
60, 61
I In normal operation, pulling the TEST pin to VDD inhibits the single
tone. In testing operation, pulling the TEST pin to VSS enables a
single tone to be created by pressing two keys simultaneously, and all
of the timing parameters for pulse dialing are faster than in normal
operation.
I Power supply pin for LCD driver.
A 1µF capacitor is connected between VLCD and VSS.
I CP is the voltage control capacitor positive pin.
CN is the voltage control capacitor negative pin.
A 1 µF capacitor is connected between these two pins.
Publication Release Date: November 1997
- 5 - Revision A3

5 Page





W91550DN arduino
W91550DN SERIES
Mute
OFF HOOK , (or ON HOOK & HFI ¡õ ), MUTE
The MUTE is switched on and off by the mute key. The function timing diagram is shown in Figure 9.
Hold Key
OFF HOOK , (or ON HOOK & HFI ¡õ ), H
1. The HOLD function is switched on and off by the hold key. When the hold function is toggled on,
the hold mark (dot of digit_6) will be lit. The function timing diagram is shown in Figure 10(a, b).
2. The HOLD key will be ignored during dialing.
Cascaded and Mixed Dialing
Cascaded Dialing
1. Definition of cascaded dialing:
In cascaded dialing, a new sequence may be pressed before the previous sequence has been sent
out completely. The following are examples of cascaded dialing:
Example 1: Normal dialing + Repertory dialing 1 + Repertory dialing 2 +...
Example 2: Repertory dialing 1 + Normal dialing + Repertory dialing 2 +...
Example 3: Redialing + Normal dialing + Repertory dialing +...
2. Normal dialing, redialing, or repertory dialing as represented by each rectangle above is treated as
one sequence.
3. At most 32 digits are allowed in cascaded dialing, but there is no limitation on the number of
sequences.
4. The content of cascaded dialing may a combination of normal dialing, redialing, and repertory
dialing. Redialing is valid only as the first key-in, however.
5. If ON HOOK , OFF HOOK , R is entered, then the cascaded dialing sequence described
in the examples above will be dialed out only if the total number of digits does not exceed 32. If the
sequence exceeds 32 digits then redialing is inhibited.
Mixed Dialing
1. Definition of mixed dialing:
The examples of cascaded dialing given above are also examples of mixed dialing except that in
mixed dialing a new sequence may be accepted only when the previous sequence has been dialed
out completely.
2. There is no limitation on the number of digits and sequences in the mixed dialing.
3. The content of mixed dialing may be a combination of normal dialing, memory dialing, or one-key
redialing.
- 11 -
Publication Release Date: November 1997
Revision A3

11 Page







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