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W91F822AN Schematic ( PDF Datasheet ) - Winbond

Teilenummer W91F822AN
Beschreibung 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE/ LOCK AND HOLD FUNCTIONS
Hersteller Winbond
Logo Winbond Logo 




Gesamt 20 Seiten
W91F822AN Datasheet, Funktion
Preliminary W91F820N SERIES
13-FLASH MEMORY TON/PULSE DIALER WITH
HANDFREE, LOCK AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91F820N is a series of tone/pulse switchable telephone dialers with 13-flash memory, keytone,
hold, lock, 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
Ten 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 5 × 5 keyboard
Easy operation with redial, flash, pause, and */T keypads
Pause, PT (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
Minimum intertone pause: 93 mS
Pause time: 3.6 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-pin 300 mil, or 22-pin 400 mil dual-in-line plastic package
The different dialers in the W91F820N series are shown in the following table:
TYPE NO.
W91F820N
W91F820AN
W91F820LN
W91F820ALN
W91F822N
W91F822AN
PULSE
(PPS)
10
10
10
10
20
20
LOCK
-
-
-
-
KEY
TONE
-
-
HANDFREE
DIALING
-
-
-
PACKAGE
(PINS)
20
22
20
22
20
22
Publication Release Date: January 1999
- 1 - Revision A1






W91F822AN Datasheet, Funktion
Preliminary W91F820N SERIES
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
Note: D1, ..., Dn, D1`, ..., Dn`, */T, #, Mn: EM1, ..., EM3, Ln: 09
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
OFF HOOK (or ON HOOK & HFI
, D1 , D2 , , Dn , BUSY
Come ON HOOK , OFF HOOK (or ON HOOK & HFI
), 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.
Number Store
1. OFF HOOK (or ON HOOK & HFI
), D1 , D2 , ..., Dn , S , S ,
Mn (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 & HFI
), S , D1 , D2 , ..., Dn , S ,
Mn (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.
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.
-6-

6 Page









W91F822AN pdf, datenblatt
Preliminary W91F820N SERIES
Timing Waveforms, continued
HKS
KEY IN
DP
T/P MUTE
(long mute)
H/P MUTE
KT
DTMF
OSC.
R/P
B
T PDP
M
T IDP
MB
TIDP
TPDP
TIDP
ON HOOK
LOW
OSC.
Figure 1(c) Pulse Mode Timing Diagram (Auto dialing without lock)
HKS
KEY IN
DP
T/P MUTE
(long mute)
H/P MUTE
KT
DTMF
OSC.
<300 mS
R/P
M
B
TFKD
TIDP
TPDP
TIDP
LOW
OSC.
Figure 1(d) Pulse Mode Timing Diagram (Auto dialing with lock function)
- 12 -

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