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PDF W91F822N Data sheet ( Hoja de datos )
| Número de pieza | W91F822N | |
| Descripción | 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE/ LOCK AND HOLD FUNCTIONS | |
| Fabricantes | Winbond | |
| Logotipo |  |
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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, 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
• 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
1 page  
Preliminary W91F820N SERIES
BLOCK DIAGRAM
HKS
HFI
XT XT
SYSTEM CLOCK
GENERATOR
ROW
(R1 ~ R4,Vx/R5)
COLUMN
(C1 ~ C4,Vss)
KEYBOARD
INTERFACE
DTMF
D/A
CONVERTER
READ/WRITE
COUNTER
CONTROL
LOGIC
LOCK
MODE
LOCATION
LATCH
RAM
PULSE
CONTROL
LOGIC
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
T/P MUTE
KT
DP
HFO
H/P MUTE
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 0
# R/P SAVE R4
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
• 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 (A+ 0−A+9) share the same memory buffer with M0−M9,
respectively
Publication Release Date: January 1999
- 5 - Revision A1
5 Page 
Preliminary W91F820N SERIES
TIMING WAVEFORMS
HKS
KEY IN
DP
T/P MUTE
H/ P MUTE
KT
DTMF
OSC.
4
TKID
B
T PDP
M
2
TIDP
MB
TIDP
2
TKID
TPDP
TIDP
LOW
OSC.
OSC.
Figure 1(a) Pulse Mode Tming Diagram (Normal dialing without lock function)
HKS
KEY IN
DP
T/P MUTE
(long mute)
H/P MUTE
KT
DTMF
OSC.
<300 mS
4
TFKD
2
MB
TIDP
LOW
OSC.
2
T KID
TPDP
TIDP
OSC.
Figure 1(b) Pulse Mode Timing Diagram (Normal dialing with lock function)
- 11 -
Publication Release Date: January 1999
Revision A1
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet W91F822N.PDF ] | |
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