W91F810AN WINBOND [Winbond], W91F810AN Datasheet - Page 3

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

PIN DESCRIPTION
(W91F810N/F8
10AN/F812N/F
812AN/F811AN
/F813AN only)
T/P MUTE
SYMBOL
Column-
K MUTE
MODE
Inputs
HKS
Row
XT
XT
KT
22-PIN
18 22
1 5
10
11
17
15
12
&
9
6
24-PIN
20 24
1 5
10
11
19
17
14
&
9
6
28-PIN
23 28
1 6
10
11
12
22
20
17
&
7
I/O
O
O
O
O
I
I
I
I
The keyboard input is compatible with a standard 6
contact (Form A) keyboard, and electronic input.
In normal operation, any single button can be
pushed to produce dual tone, pulses, or functions.
Activation of two or more buttons will result in no
response except for a single tone.
A built-in inverter together with an inexpensive
3.579545 MHz crystal supplies the oscillator. The
oscillator stops when there is no keypad input. The
crystal frequency deviation is 0.02%.
Crystal oscillator output pin.
The T/P MUTE is a conventional CMOS N-channel
open drain output.
The output transistor turns on with a low level
during a dialing sequence (both pulse and tone
mode). Otherwise, it is off.
The K MUTE is a conventional CMOS N-channel
open drain output.
Toggle action speech mute control pin by MUTE
key.
Connecting the mode pin to V
in tone mode.
Connecting the mode pin to V
in pulse mode with an M/B ratio of 40:60.
Leaving the mode pin floating places the dialer in
pulse mode with an M/B ratio of 33.3:66.7.
The HKS (hook switch) input is used to sense
whether the handset is on-hook or off-hook.
In on-hook state, HKS = 1: chip is in sleeping
mode, no operation.
In off-hook state, HKS = 0: chip is enabled for
normal operation.
HKS pin is pulled to V
The key tone output is a conventional CMOS
inverter. The key tone is generated when any valid
key is pressed; the KT pin generates a 1.2 KHz
square wave at 35 mS. When no key is pressed,
the KT pin remains in low state.
- 3 -
6 or 7
7 keyboard, an inexpensive single
Publication Release Date: March 2000
W91F810N SERIES
FUNCTION
DD
by internal resistor.
SS
DD
places the dialer
places the dialer
Revision A2