Winbond Electronics W91824N, W91824AN, W91822N, W91822AN, W91820N Datasheet
...
W91820N SERIES
13-MEMORY TONE/PULSE DIALER WITH
HANDFREE, LOCK AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91820N is a series of tone/pulse switchable telephone dialers with 13 memory, keytone, hold,
lock, and handfree dialing control features. These chips are fabricated using Winbond's highperformance 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 memory
• Ten by 32 digits two-touch indirect repertory memory
• Pulse-to-tone (*/T) keypad for long distance call operation
• Chain dialing
• Uses 5 × 5 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 ppS or 20 ppS by mask option
• Minimum tone output duration: 93 mS (unless W91824N/AN is 87 mS)
• Minimum intertone pause: 93 mS (unless W91824N/AN is 87mS)
• Pause time: 3.6 sec. (unless W91824N/AN is 2.0 sec.)
• Flash break time (73 mS, 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
• Key tone output for valid keypad entry recognition
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• 20, or 22-pin dual-in-line plastic package
• The different dialers in the W91820N series are shown in the following table:
TYPE NO. PULSE (ppS) LOCK KEY TONE HANDFREE DIALING PACKAGE (PINS)
W91820N/824N 10 W91820AN/824AN 10 W91820LN 10
W91820ALN 10
W91822N 20 W91822AN 20 -
Note: W91824N/824AN for French only.
√
√ √
√
√
- - 20
-
√
√ √
- 20
22
√
- 20
22
22
Publication Release Date: May 1999
- 1 - Revision A2
PIN CONFIGURATIONS
W91820N SERIES
C2
C4
KT
H/P MUTE
V
XT
XT
T/P MUTE
LOCK
H/P MUTE
V
XT
XT
T/P MUTE
1
2
3
C3
4
5
6
SS
7
8
9
10
W91820N/822N
/824N
C1
1
C2
2
C3
3
C4
4
5
6
7
SS
8
9
10 11
W91820LN
1
20
R4C1
19
R3
R2
18
R1
17
16
N.C.
V
15
14
13
12
11
DD
MODE
DTMF
DP
HKS
20
R4
19
R3
R2
18
R1
17
N.C.
16
V
DD
15
MODE
14
DTMF
13
12
DP
HKS
H/P MUTE
T/P MUTE
LOCK
H/P MUTE
V
T/P MUTE
HFI
2
C2
3
C3
4
C4
5
KT
6
V
SS
7
XT
8
9
XT
10
HFI
11
W91820AN/822AN
/824AN
1
C1
2
C2
3
C3
4
C4
5
6
SS
7
XT
8
9
10
11
R4C1
22
R3
21
20
R2
19
R1
N.C.
18
V
DD
17
MODE
16
DTMF
15
14
DP
13
HKS
HFO
12
22
R4
21
R3
20
R2
19
R1
18
N.C.
V
17
16
15
14
13
12
DD
MODE
DTMF
DPXT
HKS
HFO
W91820ALN
- 2 -
W91820N SERIES
XT
MUTE
MUTE
HKS
HKS
HKS
HKS
HKS
PIN DESCRIPTION
SYMBOL 20-PIN 22-PIN I/O FUNCTION
ColumnRow
Inputs
XT 8 8 I A built-in inverter together with an inexpensive 3.579545 MHz
T/P
N.C. 16 18 - No connect
MODE 14 16 I Connecting the mode pin to VSS places the dialer in tone
1−4
&
17−20
9 9 O Crystal oscillator output pin.
10 10 O
1−4
&
19−22
I
The keyboard input is compatible with a standard 5 × 5
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.
crystal supplies the oscillator. The oscillator stops when there
is no keypad input. The crystal frequency deviation is 0.02%.
The T/P
drain output.
The output transistor turns on with a low level during a dialing
sequence (both pulse and tone mode). Otherwise, it is off.
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.
is a conventional CMOS N-channel open
KT
(W91820N/8
20AN/822N/
824N/822AN
/824AN only)
11 13 I
5 5 O The key tone output is a conventional CMOS inverter. The
The
handset is on-hook or off-hook.
In on-hook state,
operation.
In off-hook state,
operation.
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.
(hook switch) input is used to sense whether the
= 1: chip is in sleeping mode, no
= 0: chip is enabled for normal
pin is pulled to VDD by internal resistor.
Publication Release Date: May 1999
- 3 - Revision A2
W91820N SERIES
LOCK
LOCK
DP
Pin Description, continued
SYMBOL 20-PIN 22-PIN I/O FUNCTION
5 5 I The function of this terminal is to prevent "0" dialing and "9"
(W91820LN/
820ALN only)
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.
The function of the
LOCK PIN
V
DD
Floating
V
SS
"0", "9" dialing inhibited
Normal dialing Mode
"0" dialing inhibited
pin is shown below:
FUNCTION
H/P MUTE 6 6 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.
12 14 O N-channel open drain dialing pulse output.
Flash key will cause DP to be active in either tone mode or
pulse mode.
In lock mode, the DP remains low for 300 mS durint offhook delay time.
The timing diagram for pulse mode is shown in Figure 1(a,
b).
DTMF 13 15 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
R1
R2
R3
R4
C1
C2
C3
Specified
697
770
852
941
1209
1336
1477
Actual
699
766
848
948
1216
1332
1472
Error %
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
VDD, VSS 15, 7 17, 7 I Power input pins for the dialer chip. VDD is the power and
VSS is the ground.
- 4 -
W91820N SERIES
HFI
HFI
HFI
Pin Description, continued
SYMBOL 20-PIN 22-PIN I/O FUNCTION
, HFO
- 11, 12 I, O Handfree control pins.
BLOCK DIAGRAM
A low pulse on the
input pin toggles the handfree
control state. The status of the handfree control state is
listed in the following table:
INPUT
HFI
HFI
HFI
Off Hook
On Hook
On Hook
NEXT STATE
HFO
DIALING
High
Low
Low
Low
Low
High
Yes
No
Yes
Yes
No
Yes
CURRENT STATE
HOOK SW.
On Hook
Off Hook
On Hook
Off Hook
Off Hook
The
pin is pulled to VDD by an internal resistor.
HFO
Low
High
High
Low
High
A detailed timing diagram is shown in Figure 3.
XT XT
ROW
(R1 ~ R4, Vx/R5)
COLUMN
(C1 ~ C4, Vss)
DTMF
KEYBOARD
INTERFACE
D/A
CONVERTER
LOCATION
LATCH
ROW & COLUMN
PROGRAMMABLE
COUNTER
- 5 - Revision A2
HKS
HFI
READ/WRITE
COUNTER
RAM
DATA LATCH
SYSTEM CLOCK
& DECODER
GENERATOR
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
LOCK
MODE
T/P MUTE
KT
DP
HFO
H/P MUTE
Publication Release Date: May 1999
W91820N SERIES
HFI
HFI
HFI
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4 VSS
1 2 3 S EM1 R1
4 5 6 F4 EM2 R2
7 8 9 A EM3 R3
*/T
F1 F2 F3 H Vx/R5
• S: Store function key
• A: Indirect repertory memory dialing function key
• H: Hold 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
• EM1, ..., EM3: Emergency one-touch memory key
• F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS; all flash
pause time is 1.0 mS
0 # R/P SAVE R4
Note: D1, ..., Dn, D1`, ..., Dn`, */T, #, Mn: EM1, ..., EM3, Ln: 0−9
Normal Dialing
OFF HOOK (or ON HOOK &
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.
), D1 , D2
, …,
Dn
Redialing Dialing
OFF HOOK (or ON HOOK &
Come ON HOOK , OFF HOOK (or ON HOOK &
The R/P key can execute redial function only as first key-in after off-hook. Otherwise, it will invoke
the pause function.
• The below cases are selected by mask option for W91824N/AN (French version) only.
In tone mode:
D1, D2, D3,*(or #), D4, D5, D6
The chip will only output D1, D2, D3 and ignore *(or #), D4, D5, D6.
In pulse mode:
D1, D2, D3, */T, D4, D5, D6
, D1 , D2
, …,
Dn , BUSY
), R/P
- 6 -
W91820N SERIES
HFI
HFI
HFI
HFI
HFI
HFI
The chip will only output D1,D2,D3 and do not transfer to tone mode. In pulse mode, the # sign
does not effect.
Number Store
1. OFF HOOK (or ON HOOK &
EMn (or A , Ln or SAVE )
a. The dialing out of D1 to Dn must first be finished before the S key is pressed.
b. D1, D2, …, Dn will be stored in memory location Mn or saved and then dialed out.
2. OFF HOOK (or ON HOOK &
EMn (or A , Ln or SAVE )
a. D1, D2, …, Dn will be stored in memory location, Mn (or saved), but will not be dialed out.
b. 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.
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.
), D1 , D2 , ..., Dn , S , S ,
), S , D1 , D2 , ..., Dn , S ,
Save
OFF HOOK (or ON HOOK &
a. D1, D2, ..., Dn will be dialed out.
), D1 , D2 , ..., Dn , Save
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 &
c. D1 to Dn will be dialed out after the SAVE key is pressed.
),
), SAVE
Repertory Dialing Procedure
One-touch direct repertory dialing:
OFF HOOK (or ON HOOK &
), Mn (or SAVE )
Publication Release Date: May 1999
- 7 - Revision A2
Loading...