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Part Name
Description
W91621 View Datasheet(PDF) - Winbond
Part Name
Description
Manufacturer
W91621
10-MEMORY TONE/PULSE DIALER WITH TWO-STAGE REDIAL FUNCTION
Winbond
W91621 Datasheet PDF : 16 Pages
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BLOCK DIAGRAM
W91620 SERIES
HKS
MODE
XT XT
SYSTEM CLOCK
GENERATION
ROW
(R1 to R4)
COLUMN
(C1 to C4)
DTMF
KEYBOARD
INTERFACE
READ/WRITE
COUNTER
RAM
LOCATION
LATCH
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
T/P MUTE
P MUTE
DP/C5
D/A
CONVERTER
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4 DP / C5
1 2 3 S P
→
T R1
456F
P
R2
789A
R3
* 0#R
R4
•
S: Store function key
•
F: Flash key
•
P
→
T: In pulse mode, this key works as Pulse
→
Tone key
•
R: Redial function key
•
A: Indirect repertory dialing key
•
P: Pause key
-4-
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