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W91330N Datasheet(PDF) 5 Page - Winbond

Part # W91330N
Description  TONE/PULSE DIALER WITH HANDFREE LOCK AND KEY TONE FUNCTION
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W91330N Datasheet(HTML) 5 Page - Winbond

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W91330N SERIES
Publication Release Date: May 1997
- 5 -
Revision A2
Pin Description, continued
SYMBOL
18-PIN
20-PIN
I/O
FUNCTION
LOCK
5
(W91330LN
only
)
5
(W91330ALN
only
)
I
The function of this terminal is to prevent "0" dialing
and "9" 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.
LOCK PIN
FUNCTION
Floating
Normal dialing mode
VDD
VSS
"0," "9" dialing inhibited
"0" dialing inhibited
BLOCK DIAGRAM
ROW
COLUMN
DTMF
XT
XT
MODE
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
READ/WRITE
(R1 to R4, Vx)
(C1 to C4)
T/P MUTE
HFO
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
LOCK
HKS
HFI
DP
KT


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