W91580 Datasheet, PDF (5/19 Pages) Winbond – 24-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE AND HOLD FUNCTIONS

W91580 SERIES
BLOCK DIAGRAM
ROW
(R1 to R5)
KEYBOARD
INTERFACE
COLUMN
(C1 to C8)
DTMF
D/A CONVERTER
HKS
MODE
XT
XT
SYSTEM CLOCK
GENERATOR
DRS
HFI
READ/WRITE
COUNTER
RAM
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KT
T/P MUTE
HPM MUTE
HFO
DP/C9
LOCATION
LATCH
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1
C2
C3
C4
C5
C6
C7 ^{DP /C9} C8
1
2
3
S
M00
M05
M10
M15
EM1 R1
4
5
6
MEMO M01
M06
M11
M16
EM2 R2
7
8
*/T
0
9
CLR
M02
M07
M12
M17
EM3 R3
#
R/P
M03
M08
M13
M18
H
R4
F1
F2
F3
R
M04
M09
M14
M19 *MER R5
* MER is for W91580B only; Fin W91580C this key performs Save function.
Publication Release Date: Auguest 1995
-5-
Revision A3