W91F820N Datasheet, PDF (5/20 Pages) Winbond – 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS

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
LOCATION
LATCH
RAM
PULSE
CONTROL
LOGIC
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
LOCK
MODE
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