W91F840N SERIES
23-FLASH MEMORY TONE/PULSE DIALER WITH
HANDFREE, LOCK AND HOLD FUNCTIONS
Publication Release Date: July 1999
- 1 - Revision A2
GENERAL DESCRIPTION
The W91F840N is a series of tone/pulse switchable telephone dialers with 23-flash memory, keytone, two store key function, hold, lock, mute, volume control and handfree dialing control features. These chips are fabricated using Winbond's high-performance CMOS technology and thus offer good performance in low-voltage, low-power operations.
FEATURES
? Tone/pulse switchable dialer
? Two by 32 digits redial and save memory
? Three by 32 digits one-touch direct repertory flash-memory
? Twenty by 32 digits one-touch direct or two-touch indirect repertory flash-memory
? The read-write times: 104
? Pulse-to-tone (*/T) keypad for long distance call operation ? Chain dialing
? Uses 6 × 6 or 7 × 7 keyboard
? Easy operation with redial, flash, pause, and */T keypads
? Pause, P →T (pulse-to-tone) can be stored as a digit in memory ? Dialing rate: 10 or 20 ppS by mask option ? Minimum tone output duration: 93 mS ? Minimum intertone pause: 93 mS ? Pause time: 3.6 sec.
? Two store key function. (S1 and S2)
? Flash break time (100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0 S ? Make/break ratio (2:3 or 1:2) selectable by MODE pin ? Mute key for speech network mute
? No key will be accepted except the "HOLD" key when in the Hold mode ? 4-level volume control by V1 and V2 pin - default value is zero ? Key tone output for valid keypad entry recognition ? On-chip power-on reset
? Uses 3.579545 MHz crystal or ceramic resonator
? 22-pin 400 mil, 24-pin 600 mil or 28-pin 600 mil dual-in-line plastic package ? The different dialers in the W91F840N series are shown in the following table:
TYPE NO. PULSE (ppS) FLASH-MEMORY LOCK KEY TONE HANDFREE DIALING
VOLUME CONTROL
PACKAGE (PINS) W91F840N 10 13 one touch, 10 two touch - √ - - 22 W91F840AN 10 13 one touch, 10 two touch - √ √ - 24 W91F840LN 10 13 one touch, 10 two touch √ - - - 22 W91F840ALN 10 13 one touch, 10 two touch √ - √ - 24 W91F841AN 10 23 one touch - √ √ √ 28 W91F841ALN 10 23 one touch
√ - √ √ 28 W91F842N 20 13 one touch, 10 two touch - √ - - 22 W91F842AN
20
13 one touch, 10 two touch -
√
√
-
24
W91F843AN 20 23 one touch
- √ √ √ 28
W91F840N SERIES
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PIN CONFIGURATIONS
W91F840N SERIES
Publication Release Date: July 1999
- 3 - Revision A2
PIN DESCRIPTION
W91F840N SERIES
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Pin Description, continued
W91F840N SERIES
Publication Release Date: July 1999
- 5 - Revision A2
Pin Description, continued
BLOCK DIAGRAM
W91F840N SERIES
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FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4 C5 V SS 1 2 3 S1 M0 EM1 R1 4 5 6 F4 M1 EM2 R2 7 8 9 Page M2 EM3 R3 */T 0 # R/P M3 SAVE R4 F1 F2 S2 H M4 Vx/R5 M5
M6 M7 M8 M9 MUTE R6
C1 C2 C3 C4 C5 C6 V SS 1 2 3 S1 M0 M10 EM1 R1 4 5 6 F4 M1 M11 EM2 R2 7 8 9 Page M2 M12 EM3 R3 */T 0 # R/P M3 M13 SAVE R4 F1 F2 S2 H M4 M14 Vx/R5 M5 M6 M7 M8 M9 R MUTE R6 M15
M16
M17 M18 M19
Vup
Vdown
R7
? S1,S2: Store function key
? Page: Indirect repertory memory dialing function key ? H: Hold function key
? R: One key redial function key ? R/P: Redial and pause function key
? */T: * in tone mode and P →T key in pulse mode ? SAVE: Save function key for one-touch 32-digit memory ? MUTE: Mute function key for speech mute
? M0?M9: One touch memory. The dialing number can be stored in M0?M9 locations by the S key.
Note that the two touch memory (Page+ 0... Page+9) share the same memory buffer with M10?M19, respectively
? M10, ..., M19: One touch or two touch memory keys. If there are no M10?M19 keys,push the key
Page + (Mm = M0?M9) can be used to simulate M10?M19.
? EM1, ..., EM3: Emergency one-touch memory key ? Page: Indiect repertory dialing function key
? F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F4 = 100 mS; all flash pause time is 1.0
S
Note: D1, ..., Dn, D1`, ..., Dn`, */T, #, Mm: M0, ..., M9, Mn: M0, ..., M19, Ln: 0?9
PAGE + LN = PAGE + Mm = M10?M19
W91F840N SERIES
Publication Release Date: July 1999
- 7 - Revision A2
Normal Dialing
OFF HOOK (or
ON HOOK
), 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.
Redialing Dialing
1. OFF HOOK (or
ON HOOK , D1 , D2 , …, Dn
, BUSY
Come
ON HOOK , OFF HOOK (or ON HOOK ), R/P
The R/P key can execute redial function only as first key-in after off-hook. Otherwise, it will invoke the pause function.
2.
OFF HOOK (or ON HOOK ), D1 , D2 , ..., Dn , R
a. The one-key redial function timing diagram is shown in Figure 5.
b. If dialing of D1 to Dn is finished, pressing R key will cause the pulse output pin to go low for 2.2 seconds break time and a 600ms pause will automatically be added.
c. If the pulses of the dialed number D1 to Dn have not finished, R
will be ignored.
3. OFF HOOK (or ON HOOK ), D1 , D2 , ..., Dn , Busy ON HOOK
come, OFF HOOK , OKR (or R/P )
If R is the first key after OFF HOOK, it only can execute the redialing function but will not cause
the pulse output pin to go low for the break time of 2.2 seconds.
Number Store
1. OFF HOOK (or ON HOOK ), D1 , D2 , ..., Dn , S1 , S1 ,
Mn (or page Ln or EMp or SAVE
)
Note: Mn: M0, ..., M19; Mm: M0, ..., M9; Emp: EM1, ..., EM3; Mo: M10?M19
or
OFF HOOK (or ON HOOK ), D1 , D2 , ..., Dn , S2 , S2 ,
Emp or Mo or SAVE or PAGE , Ln
)
W91F840N SERIES
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a. The dialing out of D1 to Dn must first be finished before the S1 or S2 key is pressed.
b. D1, D2, …, Dn will be stored in memory location Mn or saved and then dialed out.
c. D1, D2, …, Dn will be stored in memory location Mo or saved and then dialed out.
2. OFF HOOK (or ON HOOK
), S1 , D1 , D2 , ..., Dn , S1 ,
Mn (or PAGE Ln or EMp or SAVE
) or
OFF HOOK (or ON HOOK ), S2 , D1 , D2 , ..., Dn , S2 ,
Mo or EMp or
SAVE or PAGE , Ln )
D1, D2, …, Dn will be stored in memory location, Mn (S1), (Mo (S2), or saved), but will not be dialed out.
3. a. R/P and */T keys can be stored as a digit in memory, but the R/P
key cannot be the
first digit. In store mode, R/P is the pause function key.
b. 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.
Notes
a. S1: store 1 key can access the memory 0 to 19.
b. S2: store 2 key can access the memory 10 to 19.
c. Save, EM1 ~ EM3 can be accessed by S1 and S2 key.
Save
OFF HOOK (or ON HOOK ), D1 , D2 , ..., Dn ,
SAVE
a. D1, D2, ..., Dn will be dialed out.
b. If the dialing of D1 to Dn is finished, pressing SAVE will duplicate D1 to Dn to the save memory.
OFF HOOK (or ON HOOK
),
come on OFF HOOK (or ON HOOK ),
SAVE
c. D1 to Dn will be dialed out after the SAVE key is presse
d.
Repertory Dialing Procedure
One-touch direct repertory dialing: OFF HOOK (or ON HOOK ), Mn (or EMn
or
SAVE )
W91F840N SERIES
Publication Release Date: July 1999
- 9 - Revision A2
Two-touch direct repertory dialing: OFF HOOK (or ON HOOK
), Page , Ln (or Mn )
Access Pause
OFF HOOK (or ON HOOK
), D1 , D2 , R/P , D3 , ...,
Dn
1. The pause function can be stored in memory.
2. The pause function is executed with 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 ), D1 , D2 , ..., Dn , */T , D1'
,
, D2' , ..., Dn'
1. If the mode switch is set in pulse mode, then it will perform D1, D2, ---, Dn, Pause, (3.6 sec), D1', D2', ---, Dn' (Pulse) (Tone)
2. If the mode switch is set in tone mode, then the output signal will be: D1, D2, ---, Dn, * , D1', D2', ---, Dn' (Tone) (Tone)
3. It can be reset to pulse mode only if ON HOOK is active. This is because it remains in tone mode when the digits have been dialed out.
4. The function timing diagram is shown in Figure 7.
Flash
OFF HOOK (or ON HOOK ), Fn
1. Fn = F1, F2, F4. If Fn is pressed, the dialer will execute a flash break time of 600 mS (F1), 300 (F2), 100 mS (F4) and a pause time of 1.0 second before the next digit is dialed out.
2. The flash key has the first priority of the keyboard function only one flash key will be released to the user.
3. When the flash key is key in, the system will return to the initial state after the flash pause time is finished.
4. The flash function timing diagram is shown in Figure 8.
W91F840N SERIES
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Cascaded Dialing
OFF HOOK (or ON HOOK
)
1. Normal Dialing + Repertory Dialing + Normal Dialing (1st sequence) (2nd sequence)
2. Repertory Dialing + Normal Dialing + Repertory Dialing (1st sequence) (2nd sequence)
3. Redialing + Normal Dialing + Repertory Dialing (1st sequence) (2nd sequence) Redialing is valid only for the first key-in.
The second sequence should not be operated until the first sequence is dialed out completely.
Mute
OFF HOOK , MUTE
MUTE has an on/off toggle function.
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL RATING UNIT DC Supply Voltage V DD -V SS -0.3 to +7.0 V
V IL V SS -0.3 V Input/Output Voltage V IH V DD +0.3 V V OL V SS -0.3 V
V OH V DD +0.3 V Power Dissipation P D 120 mW Operation Temperature T OPR -20 to +70 °C Storage Temperature
T STG
-55 to +150
°C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
W91F840N SERIES
Publication Release Date: July 1999
- 11 - Revision A2
DC CHARACTERISTICS
(V DD ?V SS = 2.5V, Fosc. = 3.58 MHz, T A = 25° C, all outputs unloaded)
W91F840N SERIES
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AC CHARACTERISTICS
PARAMETER SYM. CONDITIONS
MIN. TYP. MAX. UNIT Key-in Debounce T KID - - 20 - mS Key Release Debounce T KRD -
- 20 - mS On-hook Debounce T OHD Lock Mode - 20 - mS
Unlock Mode
- 150 - mS Pre-digit Pause 1 T PDP1 Mode Pin = V DD - 40 - mS
10 ppS Mode Pin = Floating - 33.3 - mS Pre-digit Pause 2 T PDP2 Mode Pin = V DD - 20 - mS
20 ppS Mode Pin = Floating - 16.7 - mS Inter Digit Pause (Auto Dialing)
T IDP
10 ppS
(Unless 91F840N/W91F840AN/ 840LN/F840ALN/F841AN/ F841ALN only )
-
800
-
mS
20 ppS
(W91F842N/F842AN/F843AN only)
- 500 - mS
Interdigit Pause T IDP 10 ppS - 800 - mS (Auto dialing) 20 ppS
- 500 - mS Make/Break Ratio M:B Mode Pin = V DD - 40:60 - %
Mode Pin = Floating - 33.3:66.7
- % Tone Output Duration T TD - 93 - mS Intertone Pause T ITP
- 93 - mS Flash Break Time T FB F1 - 600 - mS F2 - 300 -
F4 - 100 - Flash Pause Time T FP - - 1.0 - S Pause Time T P - - 3.6 - S Key Tone Frequency F KT - - 1.2 - KHz Key Tone Duration T KTD - - 35 - mS One-key Redialing Pause Time T RP - - 600 - mS One-key Redialing Break Time T RB -
- 2.2 - S First Key-in Delay
T FKD
Lock only
-
300
-
mS
Notes:
1. Crystal parameters suggested for proper operation are Rs < 100 ?, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF, Fosc. = 3.579545 MHz ±0.02%.
2. Crystal oscillator accuracy directly affects these times.
W91F840N SERIES
Publication Release Date: July 1999
- 13 - Revision A2
VOLUME CONTROL FLOW CHART
W91F840N SERIES
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Volume Control Flow Chart, continied
W91F840N SERIES
Publication Release Date: July 1999
- 15 - Revision A2
TIMING WAVEFORMS
Figure 1(a) Pulse Mode Tming Diagram (Normal dialing without lock function)
Figure 1(b) Pulse Mode Timing Diagram (Normal dialing with lock function)
W91F840N SERIES
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Timing Waveforms, continued
Figure 1(c) Pulse Mode Timing Diagram (Auto dialing without lock)
Figure 1(d) Pulse Mode Timing Diagram (Auto dialing with lock function)
W91F840N SERIES
Publication Release Date: July 1999
- 17 - Revision A2
Timing Waveforms, continued
Figure 2(a) Tone Mode Timing Diagram (Normal dialing without lock)
Figure 2(b) Tone Mode Timing Diagram (Normal dialing with lock function)
W91F840N SERIES
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Timing Waveforms, continued
Figure 2(c) Tone Mode Timing Diagram (Auto dialing without lock)
Figure 2(d) Tone Mode Timing Diagram (Auto dialing with lock function)
W91F840N SERIES
Publication Release Date: July 1999
- 19 - Revision A2
Timing Waveforms, continued
Figure 2(e) Tone Mode Timing Diagram with On-hook Debounce (Auto dialing)
Figure 3(a)
W91F840N SERIES
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Timing Waveforms, continued
Figure 3(b)
Note: The H KEY and HFI inputs will toggle the HFO signal. The first time HFI or H KEY are activated, the HFO signal will go high and the previous active input will be neglected.
Figure 3(c)
Note: The HKS signal change of state from high to low will initialize both the HFO and H/P MUTE signals.