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W91330N Datasheet(PDF) 5 Page - Winbond |
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W91330N Datasheet(HTML) 5 Page - Winbond |
5 / 17 page 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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