Datasheet W91590L, W91590CL, W91590C, W91590BL, W91590B Datasheet (Winbond Electronics)

W91590 SERIES

24-MEMORY TONE/PULSE SWITCHABLE DIALER

WITH HANDFREE, HOLD AND LOCK FUNCTIONS

GENERAL DESCRIPTION

The W91590 series dialers Si-gate CMOS IC tone/pulse switchable dialers with a 24-channel
automatic dialing memory, including a 16-digit × 3 emergency dialing memory, a 16-digit × 20
channel repertory memory that provides one-touch and three-touch dialing, and a 32-digit mercury
memory. These dialers also provide flash, clear, hold, and one-key redial functions.

FEATURES

• DTMF/Pulse switchable dialer

• 32-digit LNB (last number buffer) memory (both tone and pulse mode)

• 32-digit mercury memory (tone/pulse mode)

• 16-digit × 3 one-touch direct repertory memory (tone/pulse mode)

• 16-digit × 20 direct or indirect repertory memory (tone/pulse mode)

• Uses 9 × 5 keyboard

• Flash time: 98 mS, 305 mS, or 600 mS (selectable by keypad option)

• Pause time: 3.6 sec.

• Pause P→T (pulse-to-tone) can be stored as a digit in memory

• Minimum tone output duration: 93 mS

• Minimum intertone pause: 93 mS

• On-chip power-on reset

• Uses 3.579545 MHz crystal or ceramic resonator

• Packaged in 22, 24 or 28-pin plastic DIP

• The different dialers in the W91590 series are shown in the following table:

TYPE NO. PULSE

(ppS)

MEMORY MERCURY

MEMORY

HOLD HANDFREE LOCK

FUNCTION

PACKAGE

W91590 10 20 - - - - 22
W91590L 10 20 - - - Yes 22
W91590A 10 20 - - Yes - 24
W91590AL 10 20 - - Yes Yes 24
W91590B 10/20 24 Yes Yes Yes - 28
W91590BL 10/20 24 Yes Yes Yes Yes 28
W91590C 10/20 24 Save Memory Yes Yes - 28
W91590CL 10/20 24 Save Memory Yes Yes Yes 28

Publication Release Date: July 1995

- 1 - Revision A3

PIN CONFIGURATIONS

W91590A

W91590AL

W91590L

W91590 SERIES

T/P MUTE

T/P MUTE

C2

C3

C4

C5

C6C76

V

SS

XT

XT

C2

C3

C4

C5

C6C76

V

SS

XT

XT

1

2

3

4

5 18

7

8

9 14

10

11 12

W91590

1

2

3

4

5 18

7

8

9 14

10

11 12

C1

1

2

C2

C3

1

R5

22C1

R4

21

20

R3

R2

19

R1

17

NC

V

16

DD

15

MODE

DTMF

13

DP/C9

HKS

T/P MUTE

C2

C3

C4

C5

C6C76

V

SS

XT

XT

HFI

2

3

4

5 20

7

8

9 16

10

11

12

R5

24C1

R4

23

22

R3

R2

21

R1

19

NC

V

18

DD

17

MODE

DTMF

15

DP/C9

14

HKS

13

HFO

T/P MUTE

3

4

C4

5 24

C5

C6C76

7

C8

8

KT

9 20

V

SS

10

11

XT

12 17

XT

13

14 1516HFO

HFI

R5

28

R4

27

R3

26

R2

25

R1

HPM MUTE

23

NC

22

DRS

21

V

DD

MODE

19

DTMF

18

DP/C9

HKS

W91590B/C

1

2

C2

3

T/P MUTE

C3

4

C4

5 24

C5

C6

C767

8

C8
KT

9 20

V

SS

10

11

XT

12 17

XT

13

14 1516HFO

HFI

1

R5

22C1

R4

21

R3

20

R2

19

R1

17

LOCK

V

DD

16

15

MODE

DTMF

13

DP/C9

HKS

T/P MUTE

C2

C3

C4

C5

C6C76

V

SS

XT

XT

HFI

2

3

4

5 20

7

8

9 16

10

11

12

R5

24C1

R4

23

R3

22

R2

21

R1

19

LOCK

V

18

DD

17

MODE

DTMF

15

DP/C9

14

HKS

13

HFO

R5

28C1

R4

27

26

R3

R2

25

R1

HPM MUTE

23

22

LOCK

21

DRS

V

DD

MODE

19

DTMF

18

DP/C9

HKS

W91590BL/CL

- 2 -

W91590 SERIES

XT

MUTE

MUTE

HKS

HKS

HKS

HKS

DP/C9

PIN DESCRIPTION

SYMBOL 22-PIN 24-PIN 28-PIN I/O FUNCTION

Column-

Row

Inputs

XT,

T/P

HPM

MUTE

MODE 15 17 19 I Pulling mode pin to VSS places the dialer in

NC 17

1−7

&

18−22

9, 10 9, 10 11, 12 I, O A built-in inverter provides oscillation with an

11 11 13 O

- - 23 O The HPM MUTE is a conventional inverter

12 14 16 I Hook switch input.

13 15 17 O N-channel open drain dialing pulse output

(W91590)19(W91590A)22(W91590B/C)

1−7

&

20−24

1−8

&

24−28

I The keyboard input may be from either the

standard 9 × 5 keyboard or an inexpensive
single contact (form A) keyboard. Electronic
input from a µC can also be used.
A valid key entry is defined by a single row
being connected to a single column.

inexpensive 3.579545 MHz crystal or
ceramic resonator.

The T/P
N-channel open drain output.
The output transistor is switched on during
pulse and tone mode dialing sequence and
flash break. Otherwise, it is switched off.

output. During pulse dialing, flash, hold, and
mercury mute functions, this pin will output
an active high. It remains in a low state at all
other times.

tone mode.
Pulling mode pin to VDD places the dialer in
pulse mode (M/B = 2:3).
Leaving mode pin floating places the dialer
in pulse mode (M/B = 1:2).

= 1: On-hook state. Chip in sleeping

mode, no operation.

= 0: Off-hook state. Chip enabled for

normal operation.

pin is pulled to VDD by internal resistor.

(Figure 1).
Flash key causes DP to go active when in

pulse mode and tone mode.

- No connection.

is a conventional CMOS

Publication Release Date: July 1995

- 3 - Revision A3

W91590 SERIES

LOCK

HFI

HFI

HFI

HFI

HFI

Pin Description, continued

SYMBOL 22-PIN 24-PIN 28-PIN I/O FUNCTION

17

(For

W91590L)

DTMF 14 16 18 O In pulse mode, remains in low state at all

19

(For

W91590AL)

22

(For

W91590BL/CL)

I The function of this pin is as follows:

LOCK PIN

V

DD

Floating

V

SS

FUNCTION

"0","9" dialing inhibited
Normal dialing
"0" dialing inhibited

times. In tone mode, outputs a dual or single
tone. Detailed timing diagram for tone mode
is shown in Figure 2.

OUTPUT FREQUENCY

Specified Actual Error%

C3

R1
R2

R3
R4
C1
C2

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 16, 8 18, 8 20, 10 I Power input pins.

, HFO

- 12, 13 14, 15 I, O Handfree control pins. A low pulse on the
input pin toggles the handfree control

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

CURRENT STATE

Hook SW.

-

On Hook
Off Hook
On Hook

Off Hook
Off Hook

HFO

Low
High
High

-

Low

High

Input

HFI

Off Hook
On Hook

On Hook

NEXT STATE

HFO
High

Low
Low
Low

Low

High

pin is pulled to VDD by internal resistor.

The detailed timing is shown in Fig 3.

KT - - 9 O Key tone signal output. A key tone will be

generated whenever a valid keys is pressed.
Frequency is 600 Hz and duration is 35 mS.

Dialing

Yes

No

Yes
Yes

No

Yes

- 4 -

W91590 SERIES

Pin Description, continued

SYMBOL 22-PIN 24-PIN 28-PIN I/O FUNCTION

DRS - - 21 I Dial rate selection.

This pin is pulled to VDD by an internal
resistor.

MODE

BLOCK DIAGRAM

DRS

1

2

PIN

V

Floating

V
V

Floating

V

DD

SS
DD

SS

TONE/PULSE

Pulse
Pulse
Tone
Pulse
Pulse

Tone

DIAL
RATE

10 ppS
10 ppS

10 ppS

20 ppS

M/B

2:3
1:2

1:2
1:2

ROW

(R1 to R5)

COLUNM

(C1 to C8)

DTMF

KEYBOARD
INTERFACE

D/A CONVERTER

HKS

LOCK

MODE

READ/WRITE

COUNTER

RAM

LOCATION

LATCH

ROW & COLUMN

PROGRAMMABLE

COUNTER

XT

SYSTEM CLOCK

GENERATOR

HFI

CONTROL

XT

LOGIC

DRS

PULSE

CONTROL

LOGIC

DATA LATCH

& DECODER

KT

T/P MUTE
HPM MUTE

HFO
DP/C9

Publication Release Date: July 1995

- 5 - Revision A3

W91590 SERIES

C1C2C3C4C5C6C7

DP/C9

C8

C9

HFI

FUNCTIONAL DESCRIPTION

Keyboard Operation

1 2 3 S M00 M05 M10 M15 EM1 R1
4 5 6 MEMO M01 M06 M11 M16 EM2 R2

7 8 9 CLR M02 M07 M12 M17 EM3 R3
*/T 0 # R/P M03 M08 M13 M18 H R4
F1 F2 F3 R M04 M09 M14 M19 *MER R5

MER location in W91590C/CL is SAVE memory.

• S: Store function key

• F1, F2, F3: Flash keys

• R: One-key redial

• H: Hold function key

•

: This key is connected to pin DP/C9 via a bipolar switching transistor and a diode

• M0j: Direct or indirect (MEMO + M0j = M1j) repertory memory

• M1j: Direct repertory dialing

• EMi: One-touch memory for emergency call

• */T: * & P→T

• CLR: Clear key

• R/P: Redial and pause function key

• MER: One-touch memory for mercury code dialing

• MEMO: Indirect repertory dialing function key

Note: Dn = 0 to 9, *, #, Mij = M00 to M19 (i = 0, 1; j = 0 to 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.

), D1 , D2

, …,

Dn

- 6 -

Redialing

HFI

HFI

HFI

HFI

HFI

HFI

1. OFF HOOK , D1 , D2

, …,

W91590 SERIES

Dn BUSY, Come ON HOOK , OFF HOOK

(or ON 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
execute pause function.

2. OFF HOOK (or ON HOOK &
a. The one-key redial function timing diagram is shown in Figure 4.

b. If dialing

of

pin to go low for 2.2 seconds. Break time and a 600 mS pause will automatically be added.

c. If the pulses of the dialed

number

D1 to Dn is completed, pressing the R key will cause the pulse output

), R/P
, D1 , D2

D1 to Dn have not finished, R will be ignored.

, …,

), D1 , D2

Dn , BUSY,

, …,

Dn , R

Number Store

1. OFF HOOK (or ON HOOK &

S , Mij , EMi or MER

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

), S , D1 , D2

, …,

Dn

Come

R/P and */T keys can be stored as a digit in memory. In store mode, R/P is the pause
function key.

The store mode can be released after the store function is executed or the state of the hook switch is
changed.

2. S , D1 , D2

D1, D2, ..., Dn will be stored in memory location Mij and will not be dialed out.

3. S , D1 , D2

a. D1, D2, ..., Dn will be stored in memory location M10 to M19 and will not be dialed out.
b. MEMO + M0j = M1j.

, …,

, …,

Dn , S , i , j

Dn , S , MEMO , M0j

Publication Release Date: July 1995

- 7 - Revision A3

W91590 SERIES

HFI

HFI

HFI

HFI

HFI

HFI

4. OFF HOOK (or ON HOOK &

or Ln

a. D1, D2, ..., Dn will be stored in memory location and will be dialed out.
b. The S key must be pressed after completion of the dialing sequence.

5. D1 , D2

D1, D2, ..., Dn will be stored in memory location Mij and will be dialed out.

6. D1 , D2

a. D1, D2, ..., Dn will be stored in memory location M10 to M19 and will be dialed out.
b. MEMO + M0j = M1j.

, …,

, …,

Dn , S , S , i , j

Dn , S , S , MEMO , M0j

), D1 , D2

, …,

Dn , S , S , Mn

Repertory Dialing

1. OFF HOOK (or ON HOOK &

2. OFF HOOK (or ON HOOK &

3. OFF HOOK (or ON HOOK &

), Mij or EMi or MER

), MEMO , i , j
), MEMO , M0j

Access Pause

OFF HOOK (or ON HOOK &

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 5.

), D1 , D2 , R/P , D3

Pulse-to-Tone (*/ T)

OFF HOOK (or ON HOOK &
*/T , D1' , D2'

1. If the mode switch is set to pulse mode, then the output signal will be:
D1, D2, ..., Dn, Pause (3.6s) , 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) (Tone)

, …,

Dn'

), D1 , D2

- 8 -

, …,

Dn ,

, …,

Dn

W91590 SERIES

HFI

HFI

HFI

HFI

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 P→T function timing diagram is shown in Figure 6.

5. */ T key can be stored as a digit in memory

Flash (F = F1, F2, F3)

OFF HOOK (or ON HOOK &

1. Flash key cannot be stored as a digit in memory, and has first priority among keyboard
functions.

2. The system will return to the initial state after the break time is finished.

3. The flash function timing diagram is shown in Figure 7.

Clear key

1. CLR , R/P (or R )

Redial and one-key redial buffer will be cleared.

2. CLR , Mij

Location Mij buffer content will be cleared.

), F

3. CLR , i , j

Location Mij buffer content will be cleared.

4. CLR , MEMO , M0j

Location Mij buffer content will be cleared.

Save

1. OFF HOOK (or ON HOOK &

D1, D2, …, Dn will be stored in save memory and dialed out.

2. OFF HOOK (or ON HOOK &

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

3. OFF HOOK (or ON HOOK &

D1, D2, …, Dn will be stored in save memory and dialed out.

), D1, D2, …,
Dn

), SAVE

), D1, D2, …,
Dn

S , S , SAVE

S , S , SAVE

Publication Release Date: July 1995

- 9 - Revision A3

CHAIN DIALING

Relationship between the memory and the chain dialing buffer:

Memory

Digit

Location

Chain Dialing Buffer

W91590 SERIES

16
16

.
.
.
.
.
.

.
.

.
.

.
.

.
.

16
32

The chain dialing buffer may be divided into four sections, allowing up to four numbers to be dialed
out in sequence. For example, if the user enters M01, M03, EM1, and normal dialing (manual dialing),
the content of sections 1 to 4 will be M01, M03, EM1, and normal dialing (manual dialing). When
numbers are entered into the chain dialing buffer, there is no need to wait until the previous dialing
sequence has been completed. Numbers may be entered directly, one after the other, even while
previous numbers are being dialed out.

M00

M01

.
.
.
.

M18
M19

M20
EM1
EM2
EM3

Normal Dialing

Section 1

Section 2

Section 3

Section 4

1. Manual Dialing + Repertory Dialing
Redial buffer content = Manual dialing + Repertory dialing

2. Repertory Dialing + Manual Dialing
Redial buffer content = Repertory dialing + Manual dialing

3. Repertory Dialing + Repertory Dialing
Redial buffer content = Repertory dialing + Repertory dialing

4. Redialing + Manual Dialing
Redial buffer content = Redialing + Manual dialing
The primary redial content may not be manual dialing, or else the last redial content will be

overwritten.

5. Redialing + Repertory Dialing

- 10 -

W91590 SERIES

Redial buffer content = Redialing + Repertory dialing
Redialing is valid only as the first key-in after off-hook or after the handfree dialing function is

toggled on.
The second sequence should not be performed until the first sequence is completely dialed out.

6. Manual Dialing + One-Key Redialing
Redial buffer content = Manual dialing
The One-key redial may only be used after dialing out of a manual dialing sequence is completed.

7. Repertory Dialing 1 (M1) + One Key Redialing +

Repertory Dialing 2 (M2) + One Key Redialing
or
Repertory Dialing 1 (M1) + One Key Redialing +

Repertory Dialing 2 (M2) , ON HOOK , OFF HOOK , Redialing
M1 and M2 represent any of the repertory dialing memories.
The first redialing will dial out M1; the second will dial out M1, M2.
If dialing out of the repertory dialing memories has not been completed, the one-key redial key will

be ignored.
Dialing of the second repertory dialing memory (M2) should not be performed until the one-key

redialing operation is completed.

Notes:

1. Chain dialing (cascaded dialing) allows for memory or manual dialing while a previous dialing sequence is still being dialed out.

2. More than one sequence of manual dialing is not permitted.
Entering more than one manual dialing sequence will inhibit redialing.
Chain dialing of more than four sections is not permitted.

Manual Dialing + M1 + Manual Dialing (two sections of manual dialing)

3. If more than four sections are entered, all sections after the fourth section will be ignored and redialing will be inhibited.

Manual Dialing + M1 + M2 + M3 + M4 (over 4 sections, ignore M4 and inhibit redial)

4. There is a 2.0 sec. inter-chain dialing pause for cascaded dialing.

Publication Release Date: July 1995

- 11 - Revision A3

W91590 SERIES

MERCURY DIALING

1. Up to 32 digits may be stored.

2. Mercury dialing is activated only as the first key-in after off-hook or handfree dialing is activated.

3. The timing diagram for the mercury memory function is given below.

KEY IN

DP

T/P MUTE

DTMF

HPM MUTE

OSC.

MER

T

P

T

IDP

OSCILLATION

Mercury Function Timing Diagram

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 PD 120 mW
Operating Temperature TOPR -20 to +70
Storage Temprature TSTG -55 to +125

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.

°C
°C

- 12 -

W91590 SERIES

HKS

HKS

DP

MUTE

HKS

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 2.0 - 5.5 V
Operating Current IOP Tone - 0.3 0.5 mA

Pulse - 0.15 0.3

Standby Current ISB

Memory Retention Current IMR
DTMF Output Voltage VTO Row group, RL = 5K 130 150 170 VrmS

Pre-emphasis ­DTMF Distortion THD

DTMF Output DC Level VTDC

DTMF Output Sink Current ITL VTO = 0.5V 0.2 - - mA

Output Sink Current

T/P
Current

HPM MUTE Output Sink
Current

HPM MUTE Output drive
Current

Output Sink

I/P Pull High Resistor

IPL VPO = 0.5V 0.5 - - mA

IML VMO = 0.5V 0.5 - - mA

IHPML VTO = 0.5V 0.5 - - mA

IHPMH VTH = 2.0V 0.5 - - mA

RKH - 300 500

= 0,

No load & No key entry

= 1, VDD = 1.0V

Col/Row, VDD = 2.0 to 5.5V
RL = 5 KΩ, VDD = 2.0 to

5.5V
RL = 5 KΩ, VDD = 2.0 to

5.5V

- - 15

- - 0.2

1 2 3 dB

- -30 -23 dB

1.0 - 3.0 V

µA

µA

KΩ

Key Tone Output Current IKTH VKTH = 2.0V 0.5 - - mA

IKTL VKTH = 0.5V 0.5 - -

HFO Drive/Sink Current IHFH VHFH = 2.0V 0.5 - - mA

IHFL VHFL = 0.5V 0.5 - ­Keypad Input Drive Current IKD VI = 0V 30 - ­Keypad Input Sink Current IKS VI = 2.5V 200 400 ­Keypad Resistance - - 5.0

Publication Release Date: July 1995

- 13 - Revision A3

µA
µA

KΩ

W91590 SERIES

AC CHARACTERISTICS

PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT

Keypad Active in Debounce TKID - - 20 - mS
Key Release Debounce TKRD - - 20 - mS
Pre-digit Pause

1

TPDP1 MODE Pin = 1 - 40 - mS

10 ppS MODE Pin =

- 33.3 -

Floating

Pre-digit Pause

2

TPDP2 MODE Pin = 1 - 20 - mS

20 ppS MODE Pin =

- 16.7 -

Floating

Interdigit Pause (Auto dialing) TIDP 10 ppS - 800 - mS

20 ppS - 500 -

Make/Break Ratio M/B MODE Pin = 1 - 40:60 - %

MODE Pin =

- 33:67 -

Floating
Tone Output Duration TTD Auto Dialing - 93 - mS
Intertone Pause TITP Auto Dialing - 93 - mS
Flash Break Time TFB - - 98 - mS

- 305 -

- 600 ­Pause Time TP - - 3.6 - S
Key Tone Frequency FKT - - 600 - Hz
Key Tone Duration TKTD - - 35 - mS
One-key Redialing Pause

TPR - - 600 - mS

Time
One-key Redialing Break Time TRB - - 2.2 - S
First Key-in Pause Time TFKP - - 600 - mS

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.

- 14 -

TIMING WAVEFORMS

H

HKS

W91590 SERIES

KEY IN

T/P MUTE

HPM MUTE

DTMF

OSC.

HKS

KEY IN

DTMF

DP

KT

2

4

KID

T

M

B

IDP

TIDP

T

PDP

LOW

T

FKP

OSCILLATION

T

Figure 1. Pulse Mode Diagram (Normal Dialing)

KID

T

TITP

TD

T

TKRD

ITP

T

2

KID

T

IDP

T

TPDP

OSCILLATION

KID

T

KRD

T

TITP

T/P MUTE

HPM MUTE

OSC.

KT

DP

LOW

LOW

HIGH

FKP

OSCILLATION

Figure 2. Tone Mode Diagram (Normal Dialing)

- 15 - Revision A3

OSCILLATION

Publication Release Date: July 1995

Timing Waveforms, continued

W91590 SERIES

HKS

OFF HOOK

HFI

H KEY

HFO

T/P MUTE

HPM MUTE

CHIP ENBLE

Note: The H KEY cannot be enabled when chip is disabled.

HKS

ON HOOK

HIGH

LOW

Figure 3(a).

OFF HOOK

HFI

H KEY

HFO

T/P MUTE

HPM MUTE

CHIP ENBLE

HIGH

Figure 3(b).

Note: The HFI and HFI inputs will toggle the HFO signal; as soon as either HFIor H KEY is activated the HFO signal will go

high and previous inputs will be ignored.

- 16 -

Timing Waveforms, continued

HKS

H KEY

HFO

W91590 SERIES

ON HOOKHKS

HFI

T/P MUTE

HPM MUTE

CHIP ENBLE

Note: Changing the state of the

HKS

KEY IN

DP

T/P MUTE

HPM MUTE

HIGH

Figure 3(c).

signal from high to low will initialize the HFO and HPM MUTE signals.

LOW

R

TKID

RB

T

IDP

T

PDP

T

IDP

T

KT

DTMF

OSC.

TFKP

LOW

OSCILLATION

Figure 4. Pulse Mode One-key Redialing Timing Diagram (when not first key)

Publication Release Date: July 1995

- 17 - Revision A3

Timing Waveforms, continued

HKS

W91590 SERIES

KEY IN

DP

T/P MUTE

HPM MUTE

DTMF

OSC.

HKS

KEY IN

DP

KT

TFKP

R/P

4

2

KID

T

MB

PDP

T

BM

TIDP

2

TIDP

LOW

OSCILLATION

Figure 5. Pause Function Timing Diagram

2

4

TKID

M

B

TIDP

TPDP

*/T

B

M

8

TIDP

IDP

T

TPDP

P

T

T/P MUTE

HPM MUTE

KT

DTMF

OSC.

TP

TIDP

FKP

T

OSCILLATION

Figure 6. Pulse-to-Tone Function Timing Diagram

- 18 -

Timing Waveforms, continued

W91590 SERIES

HKS

KEY IN

DP

T/P MUTE

HPM MUTE

DTMF

OSC.

LOW

F

TFB

KT

LOW

TFKP

OSCILLATION

Figure 7. Flash Operation Timing Diagram

Publication Release Date: July 1995

- 19 - Revision A3

W91590 SERIES

Headquarters

No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: [phone]
FAX: [phone]
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-7197006

Winbond Electronics (H.K.) Ltd.

Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: [phone]
FAX: [phone]

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: [phone]
FAX: [phone]

Note: All data and specifications are subject to change without notice.

- 20 -

Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.

2730 Orchard Parkway, San Jose,
CA 95134, U.S.A.
TEL: [phone]
FAX: [phone]