Preliminary W91560DN SERIES
BLOCK DIAGRAM
VDD VSS
XT2
XT2
REAL TIME CLOCK
GENERATOR
XT1
XT1
SYSTEM CLOCK
GENERATOR
ROW
(R1 ~ R4)
COLUMN
(C1 ~ C5)
KEYBOARD
INTERFACE
READ/WRITE
COUNTER
LOCATION
LATCH
RAM
CONTROL
LOGIC
PULSE/
TONE
CONTROL
LOGIC
DTMF
V LCD
V RTC1
VRTC2
D/A
CONVERTER
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
BACKPLANE SIGNAL
GENERATOR
SEGMENT OUTPUT
DECODER
CP CN
COM1 COM2 COM3 COM4
L.C.D.
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4
C5
DP / C6
123
E
M1
HOLD1 R1
4 5 6 F4
M2
HOLD2 R2
7 8 9 CHK
M3
APSET R3
*/T 0
# R/P RTC/HOUR
SET
R4
F1 F2 F3 OKR TIM/MIN
Vx
• */T: * in tone mode and P→T in pulse mode
• E: Store digit
• F1, F2, F3, F4: Flash keys
• M1−M3: One-touch memory
• R/P: Redial and pause function key
• OKR: One-key redial function
-6-
HKS
HFI
LOCK
MODE
H/P MUTE
T/P MUTE
DP
HFO