ETC W91F841AN

W91F840N SERIES
23-FLASH MEMORY TONE/PULSE DIALER WITH
HANDFREE, LOCK AND HOLD FUNCTIONS
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
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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
4
The read-write times: 10
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.
W91F840N
W91F840AN
W91F840LN
W91F840ALN
W91F841AN
W91F841ALN
W91F842N
W91F842AN
PULSE
(ppS)
10
10
10
10
10
10
20
20
W91F843AN
20
FLASH-MEMORY
LOCK
KEY
TONE
13 one touch, 10 two touch
13 one touch, 10 two touch
13 one touch, 10 two touch
13 one touch, 10 two touch
23 one touch
23 one touch
13 one touch, 10 two touch
13 one touch, 10 two touch
23 one touch
-
√
HANDFREE
DIALING
-
√
√
√
√
-
-
√
√
-
√
√
√
-
√
√
√
-
PACKAGE
(PINS)
22
24
22
24
28
28
22
24
-
√
√
√
28
-1-
-
-
VOLUME
CONTROL
√
√
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
PIN CONFIGURATIONS
C1
1
C2
C3
C1
1
C2
2
24
R6
23
R4
22
R6
2
21
R4
C3
3
22
R3
3
20
R3
C4
4
21
R2
C4
4
19
R2
C5
5
20
R1
C5
5
18
R1
KT
6
19
K MUTE
KT
6
17
K MUTE
H/P MUTE
7
18
V DD
H/P MUTE
7
16
V DD
VSS
8
17
MODE
8
15
MODE
XT
9
16
DTMF
9
14
DTMF
XT
10
15
T/P MUTE
11
14
HKS
HFI
12
13
HFO
VSS
XT
XT
T/P MUTE
10
13
DP
11
12
HKS
C1
1
C1
1
22
R6
C2
2
C2
2
21
R4
C3
C3
3
20
R3
C4
4
19
C5
5
18
R6
R4
3
22
R3
C4
4
21
R2
R2
C5
5
20
R1
R1
LOCK
6
H/P MUTE
K MUTE
7
18
VDD
8
17
MODE
MODE
XT
9
16
DTMF
DTMF
XT
10
15
DP
11
14
HKS
12
13
17
K MUTE
7
16
VDD
VSS
8
15
XT
9
14
10
13
W91F840LN
19
VSS
6
12
R7
27
R6
C3
3
26
R4
C4
4
25
R3
C5
5
24
R2
C6
6
23
R1
KT
7
22
K MUTE
H/P MUTE
8
21
VDD
VSS
9
20
MODE
DTMF
XT
10
19
XT
11
18
DP
T/P MUTE
12
17
HKS
HFI
V1
13
16
HFO
14
15
V2
W91F841AN/F843AN
23
LOCK
11
28
DP
24
H/P MUTE
XT
1
2
W91F840AN/F842AN
W91F840N/F842N
T/P MUTE
C1
C2
DP
HKS
T/P MUTE
HFI
W91F840ALN
-2-
HFO
C1
1
28
R7
C2
2
27
R6
C3
3
26
R4
C4
4
25
R3
C5
5
24
R2
C6
6
23
R1
LOCK
7
22
K MUTE
H/P MUTE
8
21
VDD
VSS
9
20
MODE
XT
10
19
DTMF
XT
11
18
DP
T/P MUTE
12
17
HKS
HFI
13
16
HFO
V1
14
15
V2
W91F841ALN
W91F840N SERIES
PIN DESCRIPTION
SYMBOL
22-PIN
24-PIN
28-PIN
I/O
FUNCTION
ColumnRow
Inputs
1−5
&
18−22
1−5
&
20−24
1−6
&
23−28
I
The keyboard input is compatible with a standard 6
× 6 or 7 × 7 keyboard, an inexpensive single
contact (Form A) keyboard, and electronic input.
In normal operation, any single button can be
pushed to produce dual tone, pulses, or functions.
Activation of two or more buttons will result in no
response except for a single tone.
XT
9
9
10
I
A built-in inverter together with an inexpensive
3.579545 MHz crystal supplies the oscillator. The
oscillator stops when there is no keypad input. The
crystal frequency deviation is 0.02%.
XT
10
10
11
O
Crystal oscillator output pin.
T/P MUTE
11
11
12
O
The T/P MUTE is a conventional CMOS N-channel
open drain output.
The output transistor turns on with a low level
during a dialing sequence (both pulse and tone
mode). Otherwise, it is off.
K MUTE
MODE
17
15
19
17
22
20
O
I
The K MUTE is a conventional CMOS N-channel
open drain output.
Toggle action speech mute control pin by MUTE
key.
Connecting the mode pin to VSS places the dialer
in tone mode.
Connecting the mode pin to VDD places the dialer
in pulse mode with an M/B ratio of 40:60.
Leaving the mode pin floating places the dialer in
pulse mode with an M/B ratio of 33.3:66.7.
HKS
12
14
17
I
The HKS (hook switch) input is used to sense
whether the handset is on-hook or off-hook.
In on-hook state, HKS = 1: chip is in sleeping
mode, no operation.
In off-hook state, HKS = 0: chip is enabled for
normal operation.
HKS pin is pulled to VDD by internal resistor.
KT
(W91F840N/F8
40AN/F842N/F
842AN/F841AN
/F843AN only)
6
6
7
O
The key tone output is a conventional CMOS
inverter. The key tone is generated when any valid
key is pressed; the KT pin generates a 1.2 KHz
square wave at 35 mS. When no key is pressed,
the KT pin remains in low state.
-3-
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Pin Description, continued
SYMBOL
LOCK
22-PIN
24-PIN
28-PIN
I/O
FUNCTION
6
6
7
I
The function of this terminal is to prevent "0"
dialing and "9" dialing under PABX system long
distance call control. When the first key input after
reset is 0 or 9, all key inputs, including the 0 or 9
key, become invalid and the chip generates no
output. The telephone is reinitialized by a reset.
(W91F840LN/
F840ALN/
F841ALN only)
The function of the LOCK pin is shown below:
FUNCTION
LOCK PIN
VDD
Floating
VSS
"0", "9" dialing inhibited
Normal dialing Mode
"0" dialing inhibited
H/P MUTE
7
7
8
I
The H/P MUTE is a conventional inverter output.
During pulse dialing, flash break or hold period, this
output is active high; otherwise, it remains in low
state.
DP
13
15
18
O
N-channel open drain dialing pulse output.
Flash key will cause DP to be active in either tone
mode or pulse mode.
The timing diagram for pulse mode is shown in
Figure 1(a, b).
DTMF
14
16
19
O
During pulse dialing, this pin remains in a low state
regardless of the keypad input. In tone mode, it will
output a dual or single tone.
A detailed timing diagram for tone mode is shown in
Figure 2(a, b).
OUTPUT FREQUENCY
VDD, VSS
16, 8
18, 8
21, 9
I
Specified
Actual
R1
697
699
+0.28
R2
770
766
-0.52
R3
852
848
-0.47
R4
941
948
+0.74
C1
1209
1216
+0.57
C2
1336
1332
-0.30
C3
1477
1472
-0.34
Error %
Power input pins for the dialer chip. VDD is the
power and VSS is the ground.
-4-
W91F840N SERIES
Pin Description, continued
SYMBOL
22-PIN
24-PIN
28-PIN
I/O
V1, V2
-
-
14, 15
O
HFI , HFO
-
12, 13
13, 16
FUNCTION
Volume control output pins. These two pins can be
toggled by the volume control keys (Vup, Vdown).
These two pins output is a conventional CMOS Nchannel open drain output.
I, O Handfree control pins.
A low pulse on the HFI input pin toggles the
handfree control state. The status of the handfree
control state is listed in the following table:
CURRENT STATE
HOOK SW.
HFO
NEXT STATE
INPUT
HFO
DIALING
-
Low
HFI
High
On Hook
High
HFI
Low
No
Off Hook
High
HFI
Low
Yes
On Hook
-
Off Hook
Low
Yes
Off Hook
Low
On Hook
Low
No
Off Hook
High
On Hook
High
Yes
Yes
The HFI pin is pulled to VDD by an internal resistor.
A detailed timing diagram is shown in Figure 3.
BLOCK DIAGRAM
XT
XT
HKS
HFI
ROW
(R1 ~ R7)
SYSTEM CLOCK
GENERATOR
READ/WRITE
COUNTER
CONTROL
LOGIC
LOCK
MODE
KEYBOARD
INTERFACE
T/P MUTE
KT
COLUMN
(C1 ~ C6)
PULSE
CONTROL
LOGIC
RAM
LOCATION
LATCH
DP
HFO
H/P MUTE
K MUTE
V1
V2
DTMF
D/A
CONVERTER
ROW & COLUMN
PROGRAMMABLE
COUNTER
-5-
DATA LATCH
& DECODER
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1
1
4
7
*/T
F1
M5
C2
2
5
8
0
F2
M6
C3
3
6
9
#
S2
M7
C4
S1
F4
Page
R/P
H
M8
C5
VSS
M0
M1
M2
M3
M4
M9
EM1
EM2
EM3
SAVE
MUTE
C1
1
4
7
*/T
F1
M5
M15
C2
2
5
8
0
F2
M6
M16
C3
3
6
9
#
S2
M7
M17
C4
S1
F4
Page
R/P
H
M8
M18
C5
M0
M1
M2
M3
M4
M9
M19
C6
M10
M11
M12
M13
M14
R
Vup
R1
R2
R3
R4
Vx/R5
R6
VSS
EM1
EM2
EM3
SAVE
MUTE
Vdown
R1
R2
R3
R4
Vx/R5
R6
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
-6-
W91F840N SERIES
Normal Dialing
OFF HOOK
(or
ON HOOK
&
),
HFI
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
Come
The
(or
ON HOOK
ON HOOK
,
&
OFF HOOK
,
HFI
(or
D1
ON HOOK
,
&
, …,
D2
Dn
),
HFI
, BUSY
R/P
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
&
),
HFI
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
3.
OFF HOOK
come,
If
(or
ON HOOK
OFF HOOK
,
OKR
&
D1
to
),
HFI
(or
Dn
R/P
have not finished,
D1
,
D2
, ...,
R will be ignored.
Dn
, Busy
ON HOOK
)
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
Mn
(or page
(or
ON HOOK
Ln
or
EMp
),
&
HFI
or
SAVE
D1
,
D2
, ...,
Dn
,
S1
, S1
,
,
D2
, ...,
Dn
,
S2
, S2
,
)
Note: Mn: M0, ..., M19; Mm: M0, ..., M9; Emp: EM1, ..., EM3; Mo: M10−M19
or
OFF HOOK
Emp or Mo or
(or
ON HOOK
SAVE
or
&
PAGE
),
HFI
,
Ln
D1
)
-7-
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
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
Mn
(or
(or PAGE
ON HOOK
Ln
or
HFI WR ),
&
EMp
or
SAVE
S1
,
D1
,
D2
, ...,
Dn
, S1
,
)
or
OFF HOOK
Mo
or
(or
EMp
ON HOOK
or
&
SAVE
HFI
or
PAGE
),
S2
,
Ln
,
D1
, D2
, ...,
Dn
, S2
,
)
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
first digit. In store mode,
R/P
R/P
key cannot be the
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
&
),
HFI
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
come on
(or
ON HOOK
OFF HOOK
(or
&
),
HFI
ON HOOK
c. D1 to Dn will be dialed out after the
&
HFI
SAVE
),
SAVE
key is pressed.
Repertory Dialing Procedure
One-touch direct repertory dialing:
OFF HOOK
(or
ON HOOK
&
HFI
),
-8-
Mn
(or
EMn
or
SAVE
)
W91F840N SERIES
Two-touch direct repertory dialing:
OFF HOOK
(or
ON HOOK
&
HFI
),
Page
ON HOOK
&
HFI
),
D1
,
Ln
(or
Mn
)
,
D3
Access Pause
OFF HOOK
(or
,
D2
,
R/P
, ...,
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
,
Dn'
D2'
, ...,
ON HOOK
&
HFI
),
D1
,
D2
, ...,
Dn
,
*/T
,
D1'
,
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
&
HFI
),
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.
-9-
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Cascaded Dialing
OFF HOOK
1.
(or
ON HOOK
Normal Dialing
+
Repertory Dialing
Redialing
+
Normal Dialing
+
Repertory Dialing
(2nd sequence)
+
(1st sequence)
3.
)
HFI
Repertory Dialing
(1st sequence)
2.
&
Normal Dialing
(2nd sequence)
+
Normal Dialing
(1st sequence)
+
Repertory Dialing
(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
DC Supply Voltage
Input/Output Voltage
Power Dissipation
SYMBOL
RATING
UNIT
VDD-VSS
-0.3 to +7.0
V
VIL
VSS -0.3
V
VIH
VDD +0.3
V
VOL
VSS -0.3
V
VOH
VDD +0.3
V
PD
120
mW
Operation Temperature
TOPR
-20 to +70
°C
Storage Temperature
TSTG
-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.
- 10 -
W91F840N SERIES
DC CHARACTERISTICS
(VDD−VSS = 2.5V, Fosc. = 3.58 MHz, TA = 25° C, all outputs unloaded)
PARAMETER
SYM.
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Operating Voltage
VDD
-
2.4
-
5.5
V
Operating Current
IOP
Tone
-
0.4
0.6
mA
Pulse
-
0.2
0.4
mA
Standby Current
ISB
HKS = 0, No load &
No key entry
-
-
15
µA
Memory Retention Current
IMR
HKS = 1, VDD = 1.0V
-
-
1
µA
Tone Output Voltage
VTO
Row group, RL = 5 KΩ
130
150
170
mVrms
Col/Row, VDD = 2.0−5.5V
1
2
3
dB
Pre-emphasis
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 Sink Current
IPL
VPO = 0.5V
0.5
-
-
mA
T/P MUTE Output Sink
Current
IML
VMO = 0.5V
0.5
-
-
mA
KT Drive/Sink Current
IKTH
VKTH = 2.0V
0.5
-
-
mA
IKTL
VKTL = 0.5V
0.5
-
-
mA
IHFH
VHFH = 2.0V
0.5
-
-
mA
IHFL
VHFL = 0.5V
0.5
-
-
mA
K MUTE Sink Current
IKML
VKML = 0.5V
0.5
-
-
mA
H/P MUTE
IHPH
VHPH = 2.0V
0.5
-
-
mA
Drive/Sink Current
IHPL
VHPL = 0.5V
0.5
-
-
mA
Keypad Input Drive Current
IKD
VI = 0V
4
-
-
µA
300
500
-
KΩ
200
400
-
µA
-
-
5.0
KΩ
HFO Drive/Sink Current
HKS Pull High Resister
Keypad Input Sink Current
RHKS
IKS
VI = 2.5V
Keypad Resistance
- 11 -
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
AC CHARACTERISTICS
PARAMETER
SYM.
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Key-in Debounce
TKID
-
-
20
-
mS
Key Release Debounce
TKRD
-
-
20
-
mS
On-hook Debounce
TOHD
Pre-digit
Pause1
Pre-digit Pause2
Lock Mode
-
20
-
mS
Unlock Mode
-
150
-
mS
Mode Pin = VDD
-
40
-
mS
10 ppS
Mode Pin = Floating
-
33.3
-
mS
TPDP2
Mode Pin = VDD
-
20
-
mS
Mode Pin = Floating
-
16.7
-
mS
10 ppS
-
800
-
mS
-
500
-
mS
-
800
-
mS
TPDP1
20 ppS
Inter Digit Pause
(Auto Dialing)
TIDP
(Unless 91F840N/W91F840AN/
840LN/F840ALN/F841AN/
F841ALN only)
20 ppS
(W91F842N/F842AN/F843AN
only)
Interdigit Pause
TIDP
10 ppS
20 ppS
-
500
-
mS
Make/Break Ratio
M:B
Mode Pin = VDD
-
40:60
-
%
Mode Pin = Floating
-
33.3:66.7
-
%
Tone Output Duration
TTD
-
93
-
mS
Intertone Pause
TITP
-
93
-
mS
Flash Break Time
TFB
F1
-
600
-
mS
F2
-
300
-
F4
-
100
-
-
-
1.0
-
(Auto dialing)
Flash Pause Time
TFP
S
Pause Time
TP
-
-
3.6
-
S
Key Tone Frequency
FKT
-
-
1.2
-
KHz
Key Tone Duration
TKTD
-
-
35
-
mS
One-key Redialing
Pause Time
TRP
-
-
600
-
mS
One-key Redialing
Break Time
TRB
-
-
2.2
-
S
First Key-in Delay
TFKD
-
300
-
mS
Lock only
Notes:
1. Crystal parameters suggested for proper operation are Rs < 100 Ω, 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.
- 12 -
W91F840N SERIES
VOLUME CONTROL FLOW CHART
Volume initial
data: V1 = 0,
V2 = 0
On line
In handfree
mode
Yes
Off-hook
?
In handset
mode
No
Volume set
Vol-set1:
V1 = 0,
V2 = 0
In hold mode
No
Hold
release by
handfree
?
Yes
Volume
set
Volume data
can't be changed
, and will out
handfree data
In hold mode
In handset
mode
Vol-set2:
V1 = 0,
V2 = 0
In handfree
mode
- 13 -
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Volume Control Flow Chart, continied
Volume initial
data: V1 = 0, V2 = 0
No
Chip Enable
?
Yes
No
Hand-free
?
No
Press Vup or
Vdown keys
In handset mode
Volume setting
OK ?
Yes
Yes
Yes
In hand-free mode
Press Vup or
Vdown keys
No
Yes
Volume setting
OK ?
Yes
No
Switch to
handset ?
- 14 -
No
Press hand-free
key ?
W91F840N SERIES
TIMING WAVEFORMS
HKS
4
KEY IN
2
TKID
DP
2
TKID
M
B
TIDP
M
B
TIDP
TIDP
TPDP
TPDP
T/P MUTE
H/ P MUTE
KT
DTMF
LOW
OSC.
OSC.
OSC.
Figure 1(a) Pulse Mode Tming Diagram (Normal dialing without lock function)
HKS
300 mS
KEY IN
TFKD
4
2
TKID
DP
B
2
TKID
M
TIDP
M
TPDP
B
TIDP
TIDP
TPDP
T/P MUTE
H/ P MUTE
DTMF
LOW
OSC.
OSC.
OSC.
Figure 1(b) Pulse Mode Timing Diagram (Normal dialing with lock function)
- 15 -
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Timing Waveforms, continued
HKS
R/P
KEY IN
M
DP
B
TIDP
M B
TIDP
TIDP
TPDP
TPDP
T/P MUTE
H/P MUTE
KT
LOW
DTMF
OSC.
OSC.
ON HOOK
Figure 1(c) Pulse Mode Timing Diagram (Auto dialing without lock)
HKS
KEY IN
300 mS
TFKD
R/P
M
DP
B
TIDP
M B
TPDP
TIDP
TIDP
TPDP
T/P MUTE
H/P MUTE
LOW
DTMF
OSC.
OSC.
ON HOOK
Figure 1(d) Pulse Mode Timing Diagram (Auto dialing with lock function)
- 16 -
W91F840N SERIES
Timing Waveforms, continued
HKS
3
KEY IN
2
TKID
DTMF
6
TKRD
TKRD
TTD
TITP
TKID
5
TKRD
TITP
TITP
T/P MUTE
LOW
H/P MUTE
KT
DTMF
HIGH
OSC.
OSC.
OSC.
Figure 2(a) Tone Mode Timing Diagram (Normal dialing without lock)
HKS
KEY IN
300 mS
TFKD
3
2
TKID
DTMF
TTD
6
TKRD
TKRD
TITP
TKID
5
TKRD
TITP
TITP
T/P MUTE
H/P MUTE
DTMF
OSC.
LOW
HIGH
OSC.
OSC.
Figure 2(b) Tone Mode Timing Diagram (Normal dialing with lock function)
- 17 -
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Timing Waveforms, continued
HKS
T
T < TOHD
R/P
KEY IN
TKID
DTMF
TTD
TITP
TITP
T/P MUTE
LOW
H/P MUTE
KT
DP
HIGH
OSC.
OSC.
ON HOOK
Figure 2(c) Tone Mode Timing Diagram (Auto dialing without lock)
HKS
T
T < TOHD
R/P
KEY IN
TKID
DTMF
TTD
TITP
TITP
T/P MUTE
LOW
H/P MUTE
DP
HIGH
OSC.
OSC.
TFKD
Figure 2(d) Tone Mode Timing Diagram (Auto dialing with lock function)
- 18 -
W91F840N SERIES
Timing Waveforms, continued
HKS
T
T > TOHD
R/P
KEY IN
TKID
DTMF
TTD
TITP
T/P MUTE
(return to initial state)
LOW
H/P MUTE
KT
DP
HIGH
OSC.
OSC.
ON HOOK
Figure 2(e) Tone Mode Timing Diagram with On-hook Debounce (Auto dialing)
HKS
OFF HOOK
ON HOOK
HFI
H KEY
HFO
T/P MUTE
HIGH
H/P MUTE
LOW
CHIP ENABLE
Note: The H KEY can not be enabled during chip dissable.
Figure 3(a)
- 19 -
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Timing Waveforms, continued
OFF HOOK
HKS
HFI
H KEY
HFO
T/P MUTE
HIGH
H/P MUTE
CHIP ENABLE
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.
ON HOOK
HKS
HFI
H KEY
HFO
HIGH
T/P MUTE
H/P MUTE
CHIP ENABLE
Figure 3(c)
Note: The HKS signal change of state from high to low will initialize both the HFO and H/P MUTE signals.
- 20 -
W91F840N SERIES
Timing Waveforms, continued
HKS
T
T<TOHD
4
KEY IN
TKID
M
B
DP
TIDP
TPDP
T/P MUTE
TOFD
TFKD
300 mS
H/P MUTE
TOHD
LOW
DTMF
OSC.
OSC.
OSC.
CHIP ENABLE
ON HOOK
Figure 4 Lock Function Timing Diagram
LOW
HKS
KEY IN
OKR
M
TRB
DP
B
TRP
TKID
TIDP
TPDP
TIDP
TPDP
T/P MUTE
H/P MUTE
KT
DTMF
LOW
OSC.
OSC.
Figure 5 Pulse Mode One-key Dedialing Timing Diagram
- 21 -
Publication Release Date: July 1999
Revision A2
W91F840N SERIES
Timing Waveforms, continued
HKS
4
KEY IN
2
TKID
DP
R/P
2
M
B
TIDP
M B
TIDP
TIDP
TPDP
TPDP
T/P MUTE
TP
H/P MUTE
KT
DTMF
LOW
OSC.
OSC.
Figure 6 Pause Function Timing Diagram (without LOCK function)
HKS
KEY IN
4
2
TKID
DP
B
TPDP
*/T
8
M
TIDP
M B
TIDP
T/P MUTE
TP
DTMF
TITP
H/P MUTE
KT
OSC.
OSC.
Figure 7. Pulse to Tone Function Timing Diagram(without LOCK function)
- 22 -
W91F840N SERIES
Timing Waveforms, continued
LOW
HKS
Fn
KEY IN
TKID
TFB
DP
T/P MUTE
H/P MUTE
KT
LOW
DTMF
TFP
OSC.
OSC.
Figure 8 Flash Operation Timing Diagram
Headquarters
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II,
No. 4, Creation Rd. III,
123 Hoi Bun Rd., Kwun Tong,
Science-Based Industrial Park,
Kowloon, Hong Kong
Hsinchu, Taiwan
TEL: 852-27513100
TEL: 886-3-5770066
FAX: 852-27552064
FAX: 886-3-5792766
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006
Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.
2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502
Note: All data and specifications are subject to change without notice.
- 23 -
Publication Release Date: July 1999
Revision A2