Winbond W91550DN Series User manual

W91550DN SERIES
13-MEMORY TONE/PULSE DIALER
WITH LCD AND LOCK FUNCTIONS
Publication Release Date: November 1998
- 1- Revision A3
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. FUNCTION PACKAGE
W91550DNF Default pause time is 3.6 sec. and all F1, F2, F3 are first priority. QFP
W91550DNF-1 Same as W91550DN except F3 can be stored as a digit. QFP
W91550DNH Default pause time is 3.6 sec. and all F1, F2, F3 are first priority. Chip
W91550DNH-1 Same as W91550DN except F3 can be stored as a digit. Chip

W91550DN SERIES
- 2-
PIN CONFIGURATION
1
20
33
52
64
NO. NAME NO. NAME NO. NAME NO. NAME
1
KMUTE
17 5C 33 10C 49 C6
2COM3 18 6A 34 VSS 50 R1
31A 19 6B 35 DTMF 51 R2
41B 20 6C 36 B/M 52 R3
51C 21 7A 37
TEST
53 R4
62A 22 7B 38 VDD 54 XT
72B 23 7C 39 HPM MUTE 55
XT
82C 24 8A 40 T/P
MUTE
56
HKS
93A 25 8B 41 ATS 57
HFI
10 3B 26 S/
M
42
DP
58 HFO
11 3C 27 8C 43 MODE 59 VLCD
12 4A 28 9A 44 C1 60 CP
13 4B 29 9B 45 C2 61 CN
14 4C 30 9C 46 C3 62 COM1
15 5A 31 10A 47 C4 63 COM2
16 5B 32 10B 48 C5 64
LOCK

W91550DN SERIES
Publication Release Date: November 1997
- 3- Revision A3
PIN DESCRIPTION
SYMBOL PIN I/O FUNCTION
Column,
Row
Inputs
44−49
&
50−53
IThe keyboard input may be used with either the standard 4 ×7
keyboard, an inexpensive single contact (form A) keyboard or
electronic input.
A valid key entry is defined by a single row being connected to a
single column.
XT,
XT
54, 55 I, O A built-in inverter provides oscillation with an inexpensive
3.579545MHz crystal. Most crystals do not vary by more than 0.02%.
The oscillator oscillates in off-hook or handfree mode but oscillation
ceases in on-hook mode or when the handfree mode is released.
T/P
MUTE
40 OThe T/P
MUTE
is a conventional CMOS N-channel open drain
output. The output transistor is switched on during pulse and tone
mode dialing sequences and flash breaks. Otherwise, it is switched
off.
HPM MUTE 39 OThe HPM MUTE is a conventional CMOS inverter output. During
pulse dialing, flash break, hold, and mercury mute functions, this pin
will output an active high. Otherwise, it remains in a low state.
KMUTE
1OThe
KMUTE
is a CMOS N-channel open drain output. The output
transistor is switched on only during the mute function. Otherwise, it is
switched off.
MODE 43 IPulling mode pin to VSS places the dialer in tone mode.
Pulling mode pin to VDD places the dialer in pulse mode.
Pulse or tone mode can be selected any time.
HKS
56 IHook switch input.
HKS
= VDD: On-hook state. Chip in sleeping mode, no operation.
HKS
= VSS: Off-hook state. Chip enable for normal operation.
HKS
pin is pulled to VDD by internal resistor.
DP
42 OThis pin is a CMOS inverter output. The timing diagram is shown as
Figure 1(a), 1(b), 1(c), 1(d). Flash key will cause
DP
to go active in
either pulse mode or tone mode.

W91550DN SERIES
- 4-
Pin Description, continued
SYMBOL PIN I/O FUNCTION
DTMF 35 OIn pulse mode, this pin remains in low state at all times.
In tone mode, it will output a dual or single tone. A detailed timing
diagram for tone mode is shown in Figure 2(a), 2(b), 2(c) 2(d).
Specified Actual Error %
Output Frequency
R1
R2
R3
R4
C1
C2
C3
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
VDD, VSS 38, 34 IPower input pins.
B/M 36 IMake: Break ratio select pin.
If B/M = VDD, the M/B ratio is 40:60.
If B/M = VSS, the M/B ratio is 33.3:66.7.
B/M pin is pulled to VDD by internal resistor.
S/
M
26 ISave and mercury select pin.
If S/
M
= VDD, the save function is selected.
If S/
M
= VSS, the mercury function is selected.
S/
M
pin is pulled to VDD by internal resistor.
ATS 41 IIf ATS = VDD, the auto timer function is enabled.
If ATS = VSS, the auto timer function is disabled.
ATS pin is pulled to VDD by internal resistor.

W91550DN SERIES
Publication Release Date: November 1997
- 5- Revision A3
Pin Description, continued
SYMBOL PIN I/O FUNCTION
HFI
, HFO 57, 58 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
Input HFO Dialing
High Yes
On Hook High Low No
Off Hook High Low Yes
On Hook Off Hook Low Yes
Off Hook Low On Hook Low No
Off Hook High On Hook High Yes
Low
Hook SW. HFO
HFI
NEXT STATE
HFI
HFI
−
−
HFI
pin is pulled to VDD by internal resistor.
Detailed timing diagram is shown in Figure 4.
LOCK
64 IThe
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
SS
V
FUNCTION
Normal dialing
"0", "9" dialing inhibited
"0" dialing inhibited
TEST
37 IIn 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.
VLCD 59 IPower supply pin for LCD driver.
A 1µF capacitor is connected between VLCD and VSS.
CP, CN 60, 61 ICP 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.

W91550DN SERIES
- 6-
Pin Description, continued
SYMBOL PIN I/O FUNCTION
COM1−
COM3 62, 63, 2 OCOM1−COM3 are common signal output terminals for the 1/3 duty LCD.
1(A, B, C)−
10(A, B, C) 3−33 (unless
26-pin)
O1(A, B, C) −10(A, B, C) are 10-digit segment signal output terminals.
BLOCK DIAGRAM
ROW
COLUMN
DTMF
XT XT
HKS
MODE
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A ROW & COLUMN
PROGRAMMABLE
COUNTER DATA LATCH
& DECODER
COM1 COM2 COM3
BACKPLAN SIGNAL
GENERATOR SEGMENT OUTPUT
DECODER
L.C.D.
READ/WRITE
B/M
TEST
ATS
HFI
(R1 ~ R4)
(C1 ~ C6) HPM MUTE
T/P MUTE
HFO
KMUTE
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
LOCK
S/M
DP

W91550DN SERIES
Publication Release Date: November 1997
- 7- Revision A3
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4 C5 C6 Vss
123EM1 TIM R1
456CHK M2 F1 MUTE R2
789AM3 F2 HR3
∗/T 0 # R/P ∗SAVE F3 RR4
•E: Store digit
•CHK: a. Check dialing number
b. Memory check (except mercury)
•A: Indirect repertory memory dialing function key
•R/P: Redial and pause function key
•∗/T: ∗in tone mode and P→T in pulse mode
•M1 to M3: One touch memory
•*SAVE: Save function key, If the S/
M
pin = VDD
MER, Mercury code dialing, If the S/
M
pin = VSS
•TIM: Timer display key
•F1, F2, F3: Flash keys
•MUTE: Secrecy control key
•H: Hold function key
•R: One-key redial function
Notes:
D1, ..., Dn, D1', ..., Dn': 0, ..., 9, ∗/T, #
Mn: Direct memory location M1, M2, M3
Lm, Ln, Lp: Indirect memory location 0, ..., 9
Normal Dialing
OFF HOOK (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn
1. D1, D2, ..., Dn will be dialed out.
2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.
3. The dialing mark (the dot of digit_1) will be lit until dialing is finished.
Redialing
1. OFF HOOK (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn Busy
Come ON HOOK ,OFF HOOK (or ON HOOK &
HFI
¡õ
), R/P

W91550DN SERIES
- 8-
a. The R/P key can execute the redial function only as the first key-in after off-hook; otherwise,
it will invoke the pause function.
b. The redial memory content will be D1, D2, D3, ..., Dn.
c. If redialing length oversteps 32 digits, the redialing function will be inhibited.
2. OFF HOOK (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn , Busy, R
a. The one key redialing function timing diagram is shown in Figure 3.
b. If the dialing of D1 to Dn is finished, pressing the Rkey will cause the pulse output pin
DP
to go low for 2.2 seconds break time and 0.6 seconds pause time will be added
automatically.
c. If the pulses of the dialed digits D1 to Dn have not finished, Rwill be ignored.
Number Store
1. OFF HOOK , (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn ,E(many times
same as one time), Mn (or A,Ln , or Ln ), ON HOOK
D1, D2, ..., Dn will be stored in memory location Mn (or Ln) and will be dialed out.
2. OFF HOOK , (or ON HOOK &
HFI
¡õ
), E,D1 ,D2 , ..., Dn ,E
(could be skipped), Mn ,ON HOOK
OFF HOOK (or ON HOOK &
HFI
¡õ
), E,D1 ,D2 , ..., Dn ,E
A(could be skipped), Ln ,ON HOOK
a. D1, D2, ..., Dn will be stored in memory location Mn (or Ln) but will not be dialed out.
b. R/P and */T keys can be stored as a digit in memory, but R/P key cannot be the first
digit. In store mode, R/P is the pause function key.
c. The store mode is released after the store function is executed or when the state of the hook
switch changes or the flash function is executed.
3. OFF HOOK ,E,Mn , (or A,Ln , or Ln )
The redial content will be copied to memory location Mn (or Ln).
Save
If the S/
M
pin = VDD, the save function is selected:
1. OFF HOOK , (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn ,CONVERSATION,
E,D1' ,D2' , ..., Dn' ,SAVE

W91550DN SERIES
Publication Release Date: November 1997
- 9- Revision A3
D1', D2', ..., Dn' will be stored in save memory but will not be dialed out.
2. OFF HOOK , (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn ,SAVE
a. D1, D2, ..., Dn will be dialed out before the SAVE key is pressed.
b. The D1, D2, ..., Dn will be copied to save memory when the SAVE key is pressed after
D1, D2, ..., Dn dialing is finished.
3. OFF HOOK , (or ON HOOK &
HFI
¡õ
), SAVE
a. D1, D2, ..., Dn will be dialed out when the SAVE key is pressed.
b. All of the sequences will be displayed on the LCD.
Mercury
If the S/
M
pin = VSS, the mercury function is selected:
1. OFF HOOK , (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn ,CONVERSATION,
E,D1' ,D2' , ..., Dn' ,MER
D1', D2', ..., Dn' will be stored in mercury memory but will not be dialed out.
2. MERCURY memory content = D1', D2', ..., Dn'
a. OFF HOOK , (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn ,MER
D1, D2, ..., Dn will be dialed out but the MER's contents can't be dialed out.
b. OFF HOOK , (or ON HOOK &
HFI
¡õ
), MER
D1', D2', ..., Dn' will be dialed out, and the mercury mark (the dot of digit_10) will be blinking during
mercury dialing. Detailed timing diagram is shown in Figure 5.
c. The MER key can be used to execute the mercury function only when it is the first key-in in
dialing mode after off-hook state or first priority flash operation (except W91550DN-1's F3).
d. With the exception of the mercury mark, the contents of mercury memory will not be displayed
on the LCD.
e. Mercury memory cannot be checked in memory check mode.
Repertory Dialing
1. One-touch direct repertory dialing.
a. OFF HOOK , (or ON HOOK &
HFI
¡õ
), Mn
b. OFF HOOK , (or ON HOOK &
HFI
¡õ
), SAVE (or MER )
2. Two-touch indirect repertory dialing.
OFF HOOK , (or ON HOOK &
HFI
¡õ
), A,Ln

W91550DN SERIES
- 10 -
Access Pause
OFF HOOK (or ON HOOK &
HFI
¡õ
), D1 ,D2 ,R/P ,D3 , ..., Dn
1. The pause function can be stored in memory.
2. The pause function is executed in normal dialing, redialing, or memory dialing.
3. The pause function timing diagram is shown in Figure 6.
Pulse-to-tone (*/T)
OFF HOOK (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn ,*/T ,D1' ,
D2 , ..., Dn'
1. If the mode switch is set to pulse mode, then the output signal will be:
D1, D2, ..., Dn, Pause (3.6 sec), D1', D2', ..., Dn'
(Pulse) (Tone)
2. If the mode switch is set to tone mode, then the output signal will be:
D1, D2, ..., Dn, * , D1', D2', ..., Dn'
(Tone) (Tone)
3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse
mode only by going on-hook.
4. The pulse-to-tone function timing diagram is shown in Figure 7.
TIM
OFF HOOK , (or ON HOOK &
HFI
¡õ
), D1 ,D2 , ..., Dn (or Redialing
or Repertory dialing ), CONVERSATION, TIM
1. If no key is pressed after dialing and ATS pin = 1, the LCD will automatically display counting time
after 6 seconds.
2. The timer will count after the TIM key is pressed from 00:00.
Flash (F = F1, F2, F3)
OFF HOOK , (or ON HOOK &
HFI
¡õ
), F
1. The dialer will execute flash break times of 600 mS (F1), 300 mS (F2), or 98 mS (F3) and a pause
time of 1.2 sec. before the next digit is dialed out.
2. The flash key cannot be stored as a digit in memory and it has the first priority among keyboard
functions (except for the F3 key of W91550DN-1).
3. The system will return to the initial state after pause time is finished.
4. Keyboard functions are inhibited during flash and when flash break is being executed.
5. The flash timing diagram is shown in Figure 8 and 12.

W91550DN SERIES
Publication Release Date: November 1997
- 11 - Revision A3
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 ,Ris 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.

W91550DN SERIES
- 12 -
4. If ON HOOK ,OFF HOOK ,Ris entered, then the mixed dialing sequence described in
the above examples will be dialed out only if the total number of digits does not exceed 32. If the
total exceeds 32 digits, then redialing is inhibited.
Combining Cascaded and Mixed Dialing
1. Cascaded dialing and mixed dialing may be combined, and each follows the rules described above.
2. To apply redialing to combinations of cascaded and mixed dialing:
ON HOOK ,OFF HOOK ,R, then redialing will be executed only if the total number of
digits does not exceed 32. Otherwise, the redialing is inhibited.
3. If there had been n cascaded sequences with a total of 30 digits dialed, then for the (n+1)th
cascaded sequence, one 2-digit normal dialing sequence or one complete repertory dialing
sequence (length up to 32 digits) can be dialed. The (n+2)th sequence will not be accepted for
cascaded dialing.
4. After a total of 32 digits of cascaded dialing have been completed, mixed dialing can be added.
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATING UNIT
DC Supply Voltage VDD−VSS -0.3 to +7.0 V
Input/output Voltage VIL VSS -0.3 V
VIH VDD +0.3 V
VOL VSS -0.3 V
VOH VDD +0.3 V
Power Dissipation PD120 mW
Operating Temperature TOPR -20 to 70 °C
Storage Temperature TSTG -55 to 125 °C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
DC CHARACTERISTICS
(VDD−VSS = 3V, FOSC. = 3.58MHz,TA= 25°C, alloutputunloaded)
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
Operating Voltage VDD -2.0 -5.5 V
Operating Current IOP Tone, Unloaded -0.6 1.0 mA
Pulse, Unloaded -0.4 0.8
Memory Retention Current IMR
HKS
= VDD, VDD = 1.0V - - 0.5 µA

W91550DN SERIES
Publication Release Date: November 1997
- 13 - Revision A3
DC Characteristics, continued
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
DTMF Output Voltage VTO Rowgroup, RL= 5 KΩ130 150 170 mVrms
Pre-emphasis Col/Row, VDD = 2.0−5.5V 1 2 3 dB
DTMF Distortion THD RL= 5 KΩ,
VDD = 2.0−5.5V --30 -23 dB
DTMF Output DC Level VTDC RL= 5 KΩ,
VDD = 2.0−5.5V 1.0 -3.0 V
DTMF Output Sink Current ITL VTO = 0.5V 0.2 - - mA
DP
Output Drive Current IPH VPO = 2.0V 0.5 - - mA
DP
Output Sink Current IPL VPO = 0.5V 0.5 - - mA
Common Output Voltage VCH -2.8 3.0 3.2 V
VCL - - 00.2
Common Output Current ICH VCOM = 3.0V,
VO= VCOM -0.4V -20 - - µA
ICL VCOM = 0.0V, VO= 0.4V 20 - -
Segment Output Voltage VSH -2.8 3.0 3.2 V
VSL - - 00.2
Segment Output Current ISH VSEG = 3.0V,
VO= SEG -0.4V -5 - - µA
ISL VSEG = 0.0V, VO= 0.4V 5- -
RMS Voltage Across VON -2.0 2.12 -Vrms
a Segment VOFF - - 1.225 1.35
Average DC Offset Volatge VDC - - - 100 mV
T/P
MUTE
Output Sink
Current ITML VTPM = 0.5V 0.5 - - mA
HPM MUTE Output Sink
Current IHML VHPM = 0.5V 0.5 - - mA
KMUTE
Output Sink
Current IKML VKM = 0.5V 0.5 - - mA
Control Input Pull-up/Down
Resistor RCIP S/
M
, B/M,
TEST
, ATS,
MODE,
HFI
100 - - KΩ
HKS
Input Pull-up Resistor RHK
HKS
-300 500 KΩ
Keypad Input Drive Current IKD VI= 0V 30 - - µA
Keypad Input Sink Current IKS VI= 2.5V 200 400 -µA
Keypad Resistance RK- - - 5.0 KΩ

W91550DN SERIES
- 14 -
AC CHARACTERISTICS
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
Key-in Debounce TKID - - 20 -mS
Key Release Debounce TKRD - - 20 -mS
Off-hook Delay TOFD Lock only -300 -mS
First Key-in Delay TFKD Lock only -300 -mS
On-hook Debounce TOHD Normal mode -250 -mS
Lock mode -20 -
Pulse Mute Delay TMD B/M = VDD -40 -mS
B/M = VSS -33.3 -
Pre-digit-pause (10 ppS) TPDP B/M = VDD -40 -mS
B/M = VSS -33.3 -
Interdigit Pause (Auto dialing) TIDP 10 ppS -800 -mS
Make/Break Ratio M:B B/M = VDD -40:60 -%
B/M = VSS -33:67 -
Tone Output Duration TTD Auto dialing -87 -mS
Intertone Pause TITP Auto dialing -87 -mS
F1 -600 -
Flash Break Time TFB F2 -300 -mS
F3 -98 -
Flash Pause Time TFP F1, F2, F3 -1.2 -S
Mask option -2.0 -
Pause Time TP(default 3.6S) -3.6 -S
-4.0 -
One-key Redialing Break Time TRB - - 2.2 -S
One-key Redialing Pause Time TRP - - 0.6 -S
LCD Frame Frequency FLCD - - 50 -Hz
Notes:
1.Crystal parameters suggested for proper operation are RS<100Ω,Lm= 96mH,Cm=0.02 pF,Cn=5 pF,Cl=18 pF,and FOSC.
= 3.579545 MHz ±0.02%
2.Crystal oscillator accuracy directly affects these times.

W91550DN SERIES
Publication Release Date: November 1997
- 15 - Revision A3
LCD DISPLAY FORMAT
A. Normal Dialing
Blinking
Off hook (or press "
HFI
" switch) (Here
tone mode was selected).
Dial "0123456789"
and "56".
Note: In tone mode the tone mark (the dot of digit_9) will be lit.
B. Redialing, Save Dialing, One Touch Dialing
Press the "R/P" or "R" or "SAVE" or "Mn"
key. (Redial or SAVE or Mn =
"1234567")
C. Mercury Dialing
Blinking
Press the "MER" key, the mercury mark
(the dot of digit_10) will be blinking.

W91550DN SERIES
- 16 -
D. Abbreviated Auto Dialing
Press the "A" key (L5 = "770066") in
handset mode.
Press the "5" key.
E. Memory Check
a.
Blinking
Off hook or press the "
HFI
" switch (In
which case the handfree mode is
selected, and M3 = "035P770066").
Press the "CHK" key.
Press the "M3" key.
Note: In handfree mode the handfree mark (the dot of digit_7) will be lit.
b.
Redial content
Off hook (or press "
HFI
" switch) press
"R/P" or "R".
(M1 = "1234567890123456")
Press the "CHK" key.

W91550DN SERIES
Publication Release Date: November 1997
- 17 - Revision A3
Continued
Blinking
"M1" key.
(Display 1−10 digits)
"Any key" except "F1", "F2" and "F3"
keys.
(Display 11−16 digits)
F. Timer Function
a.
Off hook (or press "
HFI
" switch), then
press the "TIM" key.
(Display last calling time)
"774926"
After dialing "774926", press the "TIM"
key.
(Timer will start counting up)
Press the "TIM" key (Timer will stop)
b.
Off hook (or press the "
HFI
" key) dial
"774926"

W91550DN SERIES
- 18 -
Continued
After dialing "774926" press the "TIM"
key.
(Timer will start counting up)
Press the "CHK" key.
(M3 = "035P770066")
Press the "M3" key.
Blinking
The system will return to timer mode
after 6 seconds.
(Timer counts up continuously)
Press the "F1", "F2" or "F3" key.
If the flash function is selected, the timer
will stop and the LCD will display a
blinking cursor.

W91550DN SERIES
Publication Release Date: November 1997
- 19 - Revision A3
LCD PATTERN FOR DATA
2 3 4
*#PTP
5 6 7 8 9
ECHECK AF
0
1
L
Hold/Icon6Mercury/Icon10 Handfree/Icon7
Timer/Icon8
Tone/Icon9 Flash/Icon5
Mute/Icon4
Pause/Icon3
Dailing/Icon1
In use/Icon2
Notes:
1. The icon1 to icon10 are controlled by function operation.
2. The "In use/Icon2" always blinks after power on.

W91550DN SERIES
- 20 -
LCD PANEL PATTERN
1
A
1
C1 B
22 2
33 3
4
44
55 5
66 677 78
889 99(SEG)
(COM)
1
0
A
1
0
C
1
0
B
C
O
M
C
O
M
C
123
O
M
C
O
M
C
O
M
C
123
O
M
A
CB
A
CB
A
CBA CB
A
CB
A
CB ACBA
CB