W91F810AN WINBOND [Winbond], W91F810AN Datasheet - Page 4

• Manufacturer Part Number: W91F810AN
• Description: 23-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS
• Manufacturer: WINBOND [Winbond]

Pin Description, continued
LOCK
(W91F810LN/
F810ALN/
F811ALN only)
H/P MUTE
SYMBOL
DTMF
DP
22-PIN
13
14
6
7
24-PIN
15
16
6
7
28-PIN
18
19
7
8
I/O
O
O
I
I
The H/P MUTE is a conventional inverter output.
During pulse dialing, flash break or hold period, this
output is active high; otherwise, it remains in low
state.
N-channel open drain dialing pulse output.
Flash key will cause DP to be active in either tone
mode or pulse mode.
The timing diagram for pulse mode is shown in
Figure 1(a, b).
During pulse dialing, this pin remains in a low state
regardless of the keypad input. In tone mode, it will
output a dual or single tone.
A detailed timing diagram for tone mode is shown in
Figure 2(a, b).
The function of this terminal is to prevent "0"
dialing and "9" dialing under PABX system long
distance call control. When the first key input after
reset is 0 or 9, all key inputs, including the 0 or 9
key, become invalid and the chip generates no
output. The telephone is reinitialized by a reset.
The function of the LOCK pin is shown below:
- 4 -
LOCK PIN
Floating
R1
R2
R3
R4
C1
C2
C3
V
V
DD
SS
OUTPUT FREQUENCY
Specified
1209
1336
1477
697
770
852
941
"0", "9" dialing inhibited
"0" dialing inhibited
Normal dialing Mode
W91F810N SERIES
FUNCTION
FUNCTION
1216
1332
1472
Actual
699
766
848
948
Error %
+0.28
+0.74
+0.57
-0.52
-0.47
-0.30
-0.34