Aiwa TN-106, Руководство по обслуживанию

Страница: 6 / 10

10 9
1-4
5
6
7
8
9
10
11
12
13
14
15-18
IC, W91340N
Pin No. Pin Name I/O Description
IC DESCRIPTION
Column-Row Inputs
H/P MUTE
VSS
XT
______
XT
___________
T/P MUTE
HKS
______
DP
DTMF
MODE
VDD
Column-Row Inputs
The keyboard inputs may be used with either a standard 5 * 4 keyboard or an
inexpensive single contact (Form A) keyboard. Electronic input from a µC can also be
used. A valid key is defined as a single row being connected to a single column.
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.
Power input pins.
A built-in inverter provides oscillation with an inexpensive 3.579545MHz crystal or
ceramic resonator.
A built-in inverter provides oscillation with an inexpensive 3.579545MHz crystal or
ceramic resonator.
___________-
The T/P MUTE is a conventional CMOS N-channel open drain output. The output
transistor is switched on during dialing sequence and flash break time. Otherwise, it is
switched off.
Hook switch input.
________
HKS=VDD: On-hook state. Chip in sleeping mode, no operation.
________
HKS=VSS: Off-hook state. Chip is enabled for normal operation.
________
HKS pin is pulled to VDD by an internal resistor.
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, c).
In pulse mode, this pin remains in low state at all times. In the tone mode, it will
output a dual or single tone. Detailed timing diagram for tone mode is shown in Figure
2 (a, b, c).
Pulling mode pin to VSS places the dialer in tone mode.
Pulling mode pin to VDD places the dialer in pulse mode with M/B ratio of 40:60 (10
ppS, except for W91342N/W91342AN=20 ppS.)
Floating mode pin places the dialer in pulse mode with M/B ratio of 33.3:66.7 (10 ppS,
except for W91342N/W91342AN=20 ppS.)
Power input pins.
The keyboard inputs may be used with either a standard 5 * 4 keyboard or an
inexpensive single contact (Form A) keyboard. Electronic input from a µC can also be
used. A valid key is defined as a single row being connected to a single column.
I
O
I
I
O
O
I
O
O
I
I
I
Output Frequency
Specified Actual Error %
R1 697 699 +0.28
R2 770 766 -0.52
R3 852 848 -0.47
R4 941 948 +0.74
C1 1209 1216 +0.57
C2 1336 1332 -0.30
C3 1477 1472 -0.34
WAVE FORM
1
U1 Pin
1
(VCC) VOLT/DIV: 5V
While the receiving bell is ringing TIME/DIV: 1S
2
U1 Pin
3
(LFTC1) VOLT/DIV: 5V
TIME/DIV: 1S
3
U1 Pin 4 (LFTC2) VOLT/DIV: 5V
TIME/DIV: 1S
4
U1 Pin 6 (HFTC1) VOLT/DIV: 5V
TIME/DIV: 1S
5
U1 Pin
7
(HFTC2) VOLT/DIV: 5V
TIME/DIV: 1S
6
U1 Pin
8
(O/P) VOLT/DIV: 5V
TIME/DIV: 1S
7
U2 Pin 1 - 4 (C1-C4) VOLT/DIV: 2V
While the dial button is being pressed TIME/DIV: 10mS
8
U2 Pin % - * (R1-R4) VOLT/DIV: 2V
TIME/DIV: 10mS