Winbond Electronics W91578DNF, W91576DNF, W91574DNF, W91572DNF Datasheet

W91570DN SERIES

DP

23-MEMORY TONE/PULSE DIALER WITH

AUTOREDIAL RTC AND LCD DISPLAY FUNCTIONS

GENERAL DESCRIPTION

The W91570DN series ICs are Si-gate CMOS ICs that provide the signals needed for either pulse or
tone dialing. They feature 23 number memories and a 16-digit LCD driver for displaying telephone
numbers and calling time. A real time clock is included to display the time of day. The W91570DN
series is fabricated using CMOS technology providing good performance in low voltage, low power
applications.

FEATURES

• Three by 32 digits for redial, save and mercury memory

• Twenty by 16 digits for one-touch direct or two-touch indirect repertory memory

• Uses 6 × 10 keyboard

• Pause, Pulse-to-tone (*/T) and flash can be stored as a digit in memory

• Minimum tone output duration: 87 mS

• Minimum intertone pause: 87 mS

• Tone/Pulse mode pin selectable

• Make/Break ratio pin selectable

• Dialing rate (10 or 20 ppS) pin selectable

• Pause time (2.0 or 3.6 Sec) selectable by keypad

• Flash break time (100, 300, or 600 mS) selectable by keypad

• Built-in 12 or 16-digit LCD driver (1/4 duty, 1/3 bias) selectable by mask option

• Built-in calling timer from [00:00] to [59:59]

• Uses 3.579545 MHz TV quartz crystal or ceramic resonator

• Uses 32768 Hz crystal as RTC frequency base

• Packaged in 80-pin plastic QFP with RTC

• Provides one-key-redial and auto-redial functions

• Switchable 24-hour clock or 12-hour clock with p.m. mode

• 0 or 9 dialing inhibition pin for PABX systems or long distance dialing lock out

• On-hook debounce: 150 msec in normal mode and 20 msec in lock mode

• Off-hook delay 300 mS in lock mode (i.e.

• First key-in delay: 300 msec in lock mode

• MUTE key for speech mute

• Cascade and mixed dialing allowed

• The functions of the different dialers in the W91570DN series are shown in the following table:

PRODUCT NO. LCD DIGITS LOCK RTC BATTERY

W91572DNF 16
W91574DNF 16
W91576DNF 12
W91578DNF 12

will keep low for 300 mS while off hook)

√
√
√
√

1.5V
3V

1.5V
3V

Publication Release Date: May 1997

- 1 - Revision A2

PIN CONFIGURATION

TESTL

XT2

KMUTE

TEST

1

LOCK

SET

XT1

MUTE

HKS

HFI

DP/C10

TEST

2

65

W91570DN SERIES

41

80

1

25

PIN NAME QFP-80 PIN NAME QFP-80 PIN NAME QFP-80 PIN NAME QFP-80

SEG29 1 COL2 21

41 SEG9 61

SEG30 2 COL3 22 APSET 42 SEG10 62
SEG31 3 COL4 23 XT2 43 SEG11 63
SEG32 4 COL5 24

44 SEG12 64

TEST 5 COL6 25 VLCD 45 SEG13 65

6 COL7 26 VRTC2 46 SEG14 66

KT 7 COL8 27 CN 47 SEG15 67

8 COL9 28 CP 48 SEG16 68

VDD 9 ROW1 29 COM1 49 SEG17 69

NC/

10 ROW2 30 COM2 50 SEG18 70

B/M 11 ROW3 31 COM3 51 SEG19 71

DTMF 12 ROW4 32 COM4 52 SEG20 72

RTC

13 ROW5 33 SEG1 53 SEG21 73

VSS 14 XT1 34 SEG2 54 SEG22 74

H/P MUTE 15

35 SEG3 55 SEG23 75

T/P

HFO 17

16

36 SEG4 56 SEG24 76
37 SEG5 57 SEG25 77

18 VRTC1 38 SEG6 58 SEG26 78

MODE 19

39 SEG7 59 SEG27 79

COL1 20 ARD 40 SEG8 60 SEG28 80

- 2 -

PIN DESCRIPTION

XT

MUTE

16

O

MUTE

KMUTE

KMUTE

HKS

HKS

HKS

HKS

SYMBOL PIN NO. I/O FUNCTION

W91570DN SERIES

Row,
Column
Inputs

XT1,

T/P

H/P MUTE 15 O The H/P MUTE is a conventional CMOS inverter output. During

29−33

and

20−28

34, 35 I,OA built-in inverter provides oscillation with an inexpensive

6 O

I

The keyboard inputs may be used with either the standard 6×10
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.

3.579545 MHz crystal or ceramic resonater.
The oscillator ceases when a keypad input is not sensed after

chip enable and dialing is finished. The crystal frequency
deviation is ±0.02%.

The T/P
output.
The output transistor is switched on low level during the dialing
sequence (both pulse and tone mode), one-key redial break,
auto redial break and flash break. Otherwise, it is switched off.

pulse dialing, one-key redial break, auto redial break, flash
break, hold, and mercury functions, this pin will output an active
high. It remains in a low state at all other times.

The
output transistor is switched on only during mute function.
Otherwise, it is switched off.

is a conventional CMOS N-channel open drain

is a CMOS N-channel open drain output. The

36 I Hook switch input.

= VDD or floating: On-hook state. Chip in sleeping mode,

no operation.

= VSS: Off-hook state. Chip enable for normal operation.
pin is pulled to VDD by internal resistor.

- 3 - Revision A2

Publication Release Date: May 1997

Pin Description, continued

HFI

HFI

HFI

DP/C10

C10

C10

C10

SYMBOL PIN NO. I/O FUNCTION

W91570DN SERIES

, HFO

37, 17 I,

Handfree control pins. A low pulse on the

O

the handfree control state.

input pin toggles

Status of the handfree control is listed in the following table:

CURRENT STATE

Hook SW.

On Hook High Low
Off Hook High
On Hook Off Hook Low Yes
Off Hook
Off Hook High On Hook High

The

pin is pulled to VDD by internal resistor.

HFO

Low

Low On Hook Low No

Input

HFI
HFI
HFI

NEXT STATE

HFO

High

Low Yes

Dialing

Yes

No

Yes

Detailed timing diagrams are shown in Figure 4(a), 4(b).

18 O This pin is a CMOS N-channel open drain output. The flash key

will cause DP/
mode. In lock mode, the DP/

to go active in either pulse mode or tone

keeps low for 300 mS during

off-hook delay time (If first off-hook occured after power-on
reset, the DP/

will keep high for 100ms then go low 200
mS. It will be recovered when first key-in was accepted). The
timing diagram is shown as Figure 1(a), 1(b), 1(c), 1(d).

DTMF 12 O In pulse mode, this pin remains in low state at all times.

In tone mode, it will output a dual or single tone. Detailed timing
diagram for tone mode is shown in Figure 2(a), 2(b), 2(c), 2(d).

OUTPUT FREQUENCY

Specified Actual

R1
R2
R3
R4
C1
C2
C3

697
770
852

941
1209
1336
1477

699
766
848

948
1216
1332
1472

Error %

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

MODE 19 I Pulling the mode pin to VSS places the dialer in tone mode.

Pulling the mode pin to VDD places the dialer in pulse mode
and the dialing rate is 10 ppS.

Floating the mode pin places the dialer in pulse mode and the
dialing rate is 20 ppS.

- 4 -

Pin Description, continued

LOCK

LOCK

LOCK

XT2

SET

SET

SYMBOL PIN NO. I/O FUNCTION

B/M 11 I Make: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.
The B/M pin is pulled to VDD by internal resistor.

W91570DN SERIES

10

(for all lock

version)

I

The

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

COM1 to
COM4

SEG1 to
SEG32

LOCK PIN

Floating

V

DD

V

SS

49 to 52 O COM1 to COM4 are the common signal output terminal for the

1/4 duty LCD.

53 to 80,

O SEG1 to SEG32 are the 16-digit segment signal outputs.

1 to 4

FUNCTION

Normal dialing
"0", "9" dialing inhibited

"0" dialing inhibited

VLCD 45 O Power supply pin for LCD driver.

A 0.1 µF capacitor is connected between VLCD and VSS.

CP, CN 48, 47

CP is the voltage control capacitor positive pin.

I

CN is the voltage control capacitor negative pin.
A 0.1µF capacitor is connected between these two pins.

pin:

VDD, VSS 9, 14 I Power input pins.
XT2,

43, 44 I,OA quartz crystal oscillator provides an RTC frequency time base

of 32.768 KHz.

VRTC1,
VRTC2

38, 46 I Either VRTC1 should be connected to a 1.5V battery

(W91572DN/576DN) or VRTC2 should be connected to a 3.0V
battery(W91574DN/578DN), which supplies the power source
for the RTC.

RTC

13 I

In the chip enable state, pulling
RTC set function on/off, when the set function is toggled on, the
RTC can be set using the "HOUR" and "MIN" keypads.

- 5 - Revision A2

RTC

to VSS toggles the

Publication Release Date: May 1997

W91570DN SERIES

TEST

1,TEST

2,TESTL

Pin Description, continued

SYMBOL PIN NO. I/O FUNCTION

APSET 42 I If APSET = VDD or floating, 24-hour clock mode.

If APSET = VSS, 12-hour clock with p.m. mode.

ARD 40 I Auto redial function selection.

ARD

V

DD

V

SS

Floating

BREAK

4 secs

30 secs

4 secs

PAUSE WAIT INTERVAL

1 sec
1 sec

1 sec

25 secs
30 secs

-

REPEAT TIMES

10
10

1

When ARD is left floating, the one-key redial function is
enabled.

KT 7 O The key tone output is a conventional CMOS inverter.

The key tone is generated as any valid key pressed, as the KT
pin generates a 1.2 KHz square wave which keeps on 35 mS;
otherwise, it remain in low state.

TEST,

5, 8, 39,

I For testing only.

41

NC 10

(for
W91572/574/
W91576/578)

- No connection.

- 6 -

BLOCK DIAGRAM

C1C2C3C4C5C6C7C8C9

W91570DN SERIES

ROW

(R1 to R5)

COLUMN

(C1 to C9)

DTMF

V

LCD

V RTC1
V RTC2

V DD

KEYBOARD
INTERFACE

D/A

CONVERTER

CN

CP

SSV

LOCATION

ROW & COLUMN

PROGRAMMABLE

BACKPLANE SIGNAL

GENERATOR

COM2COM1 COM3

XT2

REAL TIME CLOCK

LATCH

COUNTER

GENERATOR

READ/WRITE

COUNTER

COM4

XT2

RAM

DATA LATCH
& DECODER

SEGMENT OUTPUT

DECODER

L.C.D.

GENERATOR

CONTROL

LOGIC

PULSE/

TONE

CONTROL

LOGIC

XT1

XT1

SYSTEM CLOCK

SET RTC
AP SET

HKS
HFI
LOCK
B/M

MODE
ARD

H/P MUTE
T/P MUTE
DP/C10

HFO

KT

KMUTE

FUNCTIONAL DESCRIPTION

Keyboard Operation

DP / C10
1 2 3 E HOUR M0 M5 M10 M15 HOLD1 R1
4 5 6 MUTE MIN M1 M6 M11 M16 HOLD2 R2
7 8 9 A2 SAVE M2 M7 M12 M17 MER R3

*/T 0 # R/P1 OKR M3 M8 M13 M18 A1 R4

F1 F2 F3 CHK TIM M4 M9 M14 M19 RTC R5

R/P2 - ICON12 ICON13 ICON14 ICON15 ICON16 VDD/VX/R6

Publication Release Date: May 1997

- 7 - Revision A2

W91570DN SERIES

HFI

¡õ

HFI

¡õ

• E: Store digit

• MUTE: Mute key

• F1, F2, F3: Flash keys

• SAVE: Save memory key

• MER: Mercury memory key

• OKR: One-key redial function

• RTC: Real time clock toggle key

• HOLD1, HOLD2: Hold function keys

• R/P1, R/P2: Redial and pause function keys, P1 is 3.6 sec. and P2 is 2.0 sec.

• TIM: a. Display last calling time

b. Start and/or stop counting up calling time

• HOUR and MIN: Active when setting mode is operated after off-hook

• A1, A2: Indirect repertory memory dialing function keys, A1 for page 1 and A2 for page 2

If Lp = 0 to 9, Mp = M0 to M9, and Mq = M10 to M19, then
a. A1 + Lp (or Mp) the memory location M0 to M9 will be selected
b. A2 + Lp (or Mp) the memory location M10 to M19 will be selected
c. A1 (or A2) + Mq the memory location M10 to M19 will be selected

• */T: * in tone mode and P→T in pulse mode

• CHK: a. Check dialing number

b. Check last dialing time
c. Memory check (except mercury)

• ICON12, ..., ICON16: Keys reserved for user, can be toggled on any time when the chip is enabled

Notes: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, ∗/T, #

R/P: R/P1 or R/P2

An: A1, A2
Ln: 0, ..., 9, map to indirect memory location 0, ..., 9
Mn: Direct memory location M0, ..., M19

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 the length oversteps 32 digits in normal dialing.

), D1 , D2 , ..., Dn

Redialing

If ARD pin = floating, the one-key redial function is selected:

1. OFF HOOK (or ON HOOK &

), D1 , D2 , Check Memory (or

Number Store ), D3 , ..., Dn , Busy, ON HOOK , OFF (or

- 8 -

W91570DN SERIES

HFI

¡õ

HFI

¡õ

C10

HFI

¡õ

HFI

¡õ

HFI

¡õ

Come HOOK

ON HOOK &

a.
The

b. The redial memory contents will be D3, ..., Dn.
c. Redial memory can be checked in memory check mode.
d. If redialing length oversteps 32 digits, the redialing function will be inhibited.

2. OFF HOOK (or ON HOOK &

a. If the dialingofD1 to Dn is finished, pressing the OKR key will cause the pulse output

pin DP/
automatically.

b. If the pulses of the dialed digits D1 to Dn have not finished, OKR will be ignored.

c. The one-key redialing function timing diagram is shown in Figure 3.

R/P key can execute the redial function only as the first dialing after off-hook; otherwise,

it

will invoke the pause
function.

to go low for 2.2 seconds break time and 0.6 seconds pause time will be added

), R/P

), D1 , D2 , ..., Dn , Busy, OKR

Number Entry

1. OFF HOOK (or ON HOOK

same as one time), Mn (or An , 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

(could be skipped), Mn (or An , Ln ), ON HOOK

3. OFF HOOK (or ON HOOK
(or An , 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, in store

mode,

is the pause function key.

c. The store mode is released after the store function is executed or when the state of the hook

&

&

&

), D1 , D2 ,

), E , D1 , D2 , ..., Dn , E

), E , D1 , D2 , ..., Dn , Mn

Publication Release Date: May 1997

- 9 - Revision A2

Dn , E (many

...,

R/P

times

switch changes is executed.

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

W91570DN SERIES

4. OFF HOOK ,

The redial content excluding memory dialing will be copied to memory location Mn (or Ln).

5. The first 16 digits will be stored into memory, if the key-in number over 16 digits.

E , Mn

(or An , Ln )

Save

1. OFF

HOOK

E , D1' , D2' , ..., Dn' , SAVE

D1', D2', ..., Dn' will be stored in save memory but will not be dialed out.

2. OFF

HOOK

a. If the dialing sequence D1, D2, ..., Dn has not finished, SAVE will be ignored.
b. If the sequence off hook, D1, D2, ..., Dn (dialing finish), SAVE, SAVE is keyed in, D1, D2, ...,

Dn
will be copied to save memory and D1, D2, ..., Dn will be dialed out again.
c. If the sequence off hook, D1, D2 (dialing finish), SAVE, D3, D4 (dialing finish), SAVE is keyed

in,
D1, D2 will be copied to save memory and D3, D4 will not be copied to save memory.
d. All above sequences will be displayed on LCD.

(or ON HOOK

(or ON HOOK

&

&

), D1 , D2 , ..., Dn ,

), D1 , D2 , ..., Dn , SAVE

CONVERSATION,

Mercury

OFF

HOOK

&

&

(or ON HOOK

), D1 , D2 , ..., Dn ,

CONVERSATION,

), D1 , D2 ,

&

- 10 -

Dn , MER ,

...,

), MER

1. OFF

HOOK

E , D1' , D2' , ..., Dn' , MER

D1', D2', ..., Dn' will be stored in mercury memory and display on the LCD, but will not be dialed
out.

2. MERCURY memory content = D1', D2', ..., Dn'

OFF HOOK (or ON HOOK

ON HOOK ,

a. The dialing sequence will be D1, D2, ... Dn, on hook, off hook, D1', D2', ..., Dn'.

(or ON HOOK

Come,

W91570DN SERIES

b. 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 or first priority flash operation.
c. The contents of mercury memory will not be displayed on the LCD except for mercury mark.
d. If the sequence D1, D2, ..., Dn, MER, on-hook, off-hook, MER is keyed in, D1, D2, ..., Dn will not
be copied to mercury memory, D1', D2', ..., Dn' will be dialed out, and the mercury mark (icon 10)
will be blinking after off-hook. Detailed timing diagram is shown in Figure 5.
e. Mercury memory cannot be checked in memory check mode.

Publication Release Date: May 1997

- 11 - Revision A2

Repertory Dialing

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

1. One-touch direct repertory dialing.

W91570DN SERIES

a. OFF HOOK (or ON HOOK

b. OFF HOOK (or ON HOOK

c. OFF HOOK (or ON HOOK

2. Two-touch indirect repertory dialing.

OFF HOOK (or ON HOOK

&

&

&

&

), Mn (or R/P )

), SAVE (or MER )

), Mn (or R/P ), SAVE

), An , Ln (or Mn )

Access Pause

OFF HOOK (or ON HOOK &

, Busy, Come, ON HOOK , OFF

1. The first R/P functions as a pause key and the second as a first key-in redial key.

2. The pause function can be stored in memory, and only one R/P key can be released to the user.

3. The pause function is executed in normal dialing, redialing, or memory dialing.

4. The pause duration of 2.0 or 3.6 seconds per pause is selected through the keypad.

5. The default pause duration is 3.6 seconds after power on.

6. The pause function timing diagram is shown in Figure 6.

HOOK

), D1 , D2 , R/P , D3 , ..., Dn

(or ON HOOK

&

), R/P

Pulse- to-tone (*/T)

OFF HOOK (or ON HOOK &

D2' , ..., Dn'

1. If the mode switch is set to pulse mode, then the output signal will be:

D1, D2, ... Dn, Pause (2.0 sec/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 after the digits have been dialed out and can be reset to pulse

mode only by going on-hook.

4. The pause time of pulse-to-tone is default to 3.6 seconds.

5. The pulse-to-tone function timing diagram is shown in Figure 7.

), D1 , D2 , ..., Dn , */T , D1' ,

- 12 -

Flash (F = F1, F2, F3)

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

W91570DN SERIES

OFF HOOK (or ON HOOK

1. The dialer will execute a flash break time of 600 mS (F1), 300 mS (F2), or 100 mS (F3) and pause

time of 1S before the next digit (except flash key) is dialed out.

2. Flash keeps first priority in normal dialing but insert flash can be stored into memory when flash is

the first digit in memory. In this condition, only one flash key can be released to the user.
a. E, F1, D1, D2, D3, E, Mn then the digit stored in Mn will be F1, D1, D2, D3.

b. E, D1, F1, D2, D3, E, Mn then the digit stored in Mn will be D1, D2, D3.
c. F1, D1, D2, D3, E, Mn then the digit stored in Mn will be D1, D2, D3.

3. The system will return to the initial state after the flash pause time is finished.

4. Keyboard functions are inhibited when flash break is being executed.

5. The flash timing diagram is shown in Figure 8.

&

), F

Mute

OFF HOOK (or ON HOOK

1. The MUTE is switched on and off by a toggle switch.

2. The function timing diagram is shown in Figure 9.

&

), MUTE

Hold Key

OFF HOOK (or ON HOOK

1. The hold function is toggled on and off by Hold1 or Hold2 key. When the hold function is toggled

on, the hold mark (icon 4) will be lit and all key-ins (except hold keys and icon keys) will be

ignored.

2. The following are examples of hold function toggled on and off:

a. OFF HOOK , HOLD1
b. OFF HOOK , HOLD1

c. OFF HOOK , HOLD1

d. ON HOOK &

3. Hold1 and Hold2 have the same function in off-hook state. The difference between Hold1 and

Hold2 are shown as follows:

a. If OFF HOOK , HOLD1

dialer will be off-line.

&

(or HOLD2
(or HOLD2

(or HOLD2

, HOLD1

(or HOLD2

), HOLD1 (or HOLD2 )

), HOLD1 (or HOLD2 )
),

), ON HOOK ,

(or HOLD2 ),

- 13 - Revision A2

), ON HOOK , HOLD1 is entered, then the

Publication Release Date: May 1997

W91570DN SERIES

HFI

¡õ

HFI

¡õ

HFI

¡õ

SET

¡õ

SET

¡õ

SET

SET

SET

HFI

¡õ

HFI

¡õ

If OFF HOOK , HOLD1

(or HOLD2

), ON HOOK , HOLD2 is entered, then

the dialer stay at hold function.

b. If ON HOOK &

, HOLD1

(or HOLD2 ), HOLD1 is entered, then
the dialer will be off-line.
If ON HOOK &

, HOLD1

, (or HOLD2 ), HOLD2 is entered, then

the dialer stay at hold function.

4. The function timing diagram is shown in Figure 10(a), 10(b), 10(c).

Adjusting Time Setting

OFF HOOK (or ON HOOK &

RTC

(or ON HOOK )

1. Only HOUR and MIN keys are valid in set RTC mode.

2. Hours and minutes count forward as long as the HOUR or MIN key is pressed.

3. The on/off function of
toggle off

RTC function.

RTC is toggled, and the dialer will go back to a previous state after the

),

RTC

, HOUR , MIN ,

4. If the dialing sequence D1, D2, ..., Dn (including flash and pause) has not finished,
'RTC' key pressed) will be ignored.

RTC Display Mode

OFF HOOK (or ON HOOK &

1.The real time clock display mode can be toggled on and off by RTC key.

2. The icon display will not be changed when enter RTC display mode and set RTC mode.

), RTC

Check Key

OFF HOOK (or ON HOOK &

, ..., etc.)

The redial (or memory) content will be displayed on the LCD when either R/P or OKR
is keyed in.

), CHK , R/P (or OKR , SAVE , Mn

- 14 -

RTC (or