W91550 WINBOND [Winbond], W91550 Datasheet - Page 6

• Manufacturer Part Number: W91550
• Description: 13-MEMORY TONE/PULSE DIALER WITH LCD AND LOCK FUNCTION
• Manufacturer: WINBOND [Winbond]

Pin Description, continued
BLOCK DIAGRAM
COM1
COM3
1(A, B, C)
10(A, B, C)
SYMBOL
(C1 ~ C6)
COLUMN
(R1 ~ R4)
ROW
DTMF
62, 63, 2
(unless
26-pin)
3 33
PIN
CONVERTER
KEYBOARD
INTERFACE
D/A
I/O
O
O
COM1 COM3 are common signal output terminals for the 1/3 duty
LCD.
1(A, B, C) 10(A, B, C) are 10-digit segment signal output terminals.
COM1
BACKPLAN SIGNAL
PROGRAMMABLE
GENERATOR
ROW & COLUMN
LOCATION
LATCH
COM2
COUNTER
COM3
- 6 -
READ/WRITE
COUNTER
RAM
SEGMENT OUTPUT
FUNCTION
DATA LATCH
& DECODER
DECODER
L.C.D.
W91550DN SERIES
SYSTEM CLOCK
GENERATOR
CONTROL
CONTROL
XT
LOGIC
PULSE
LOGIC
XT
T/P MUTE
HPM MUTE
KMUTE
DP
HFO
ATS
S/M
LOCK
TEST
HFI
HKS
B/M
MODE