Read Panasonic KX-TS85GB / KX-TS85GW Service Manual online
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KX-TS85GB/KX-TS85GW
Pin
No.
Symbol
Function
SS
LS
CI
RECI
RECV
RO
VDD
AGND
CBN
CM
VPP
LS1
LS2
LS2
VSSA
HEAD
FCI
LED
OSC
R1
R2
R3
R2
R3
C1
C2
C3
C4
C2
C3
C4
CLK
DI
DO
CS1
16
17
18
19
20
21
22
23
24
25
26
27
28
28
29
30
31
32
33
34
35
36
35
36
37
38
39
40
38
39
40
41
42
43
44
Supply Source Control Output
N-channel open drain output to control the external high power source transistor for supplying (Vpp) the
loudspeaker amplifier in off-hook loudspeaking/handsfree mode.
N-channel open drain output to control the external high power source transistor for supplying (Vpp) the
loudspeaker amplifier in off-hook loudspeaking/handsfree mode.
Line Current Sense Input
Analog input for sensing the line current.
Analog input for sensing the line current.
Complex Impedance Input
Analog input pin for the capacitor to program a complex impedance.
Analog input pin for the capacitor to program a complex impedance.
Analog input for the handsfree receive path. Schould be connected to RO via coupling capacitor.
Analog input for receive voice switching path.
Receive Output to Handset
Output for driving a dynamic earpiece with an impedance from 150
Output for driving a dynamic earpiece with an impedance from 150
Ω
to 300
Ω
.
Voltage Drain Drain
Positive Power Supply
Positive Power Supply
Analog Ground
Special ground for the internal amplifiers.
Special ground for the internal amplifiers.
Analog Input pin for connecting a capacitor for background noise monitoring.
Converter Make Output
This is an output for controlling the external switching converter. During ringing it converts the ring signal
into a 4V supply voltage.
This is an output for controlling the external switching converter. During ringing it converts the ring signal
into a 4V supply voltage.
Loudspeaker Power Supply
High power supply for the output driver stage.
High power supply for the output driver stage.
Loudspeaker Output 1
Output pins for a 32
Output pins for a 32
Ω
(25 to 50
Ω
) loudspeaker
Power supply pin for LS1-LS2 output amplifier.
HEADset Switch Input
Digital input for choosing handset and headset mode or choosing between LD and MF dialing. See section
“Service Code Programming 4” for further details. This pin is scanned only after manual OFF-HOOK.
Digital input for choosing handset and headset mode or choosing between LD and MF dialing. See section
“Service Code Programming 4” for further details. This pin is scanned only after manual OFF-HOOK.
Frequency Comparator Input
This is a Schmitt-trigger input for ring frequency discrimination. Disabled during off-hook.
This is a Schmitt-trigger input for ring frequency discrimination. Disabled during off-hook.
LED Output
Digital output for connecting 2mA LED.
Digital output for connecting 2mA LED.
Oscillator Input
Input for ceramic resonator 3.58MHz.
Input for ceramic resonator 3.58MHz.
Keyboard Rows
(see key arrangement)
(see key arrangement)
Keyboard Columns
(see key arrangement)
(see key arrangement)
Clock
Clock output of 3 wire bus. If signal is not activated a pull down resistor (100kOhm) is inserted.
Clock output of 3 wire bus. If signal is not activated a pull down resistor (100kOhm) is inserted.
DataInput
Data input of 3 wire bus. If signal is not activated a pull down resistor (100kOhm) is inserted.
Data input of 3 wire bus. If signal is not activated a pull down resistor (100kOhm) is inserted.
DataOutput
Data output of 3 wire bus.
A 100k resistor connected from this pin to vss enables key-locking.
If signal is not activated a pull down resistor (100kOhm) is inserted.
Data output of 3 wire bus.
A 100k resistor connected from this pin to vss enables key-locking.
If signal is not activated a pull down resistor (100kOhm) is inserted.
ChipSelect 1
Chip select signal for external EEPROM.
If signal is not activated a pull down resistor (100kOhm) is inserted.
Chip select signal for external EEPROM.
If signal is not activated a pull down resistor (100kOhm) is inserted.
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