Panasonic KX-NT136RU Service Manual ▷ View online
10.4. IC13 (SUB-CPU)
Pin
No.
Terminal Name
I/O Setting
Pull-up
Processing
Contents of Control
Remark
1
X1
I
-
Not in use
Connecting to Vcc
2
X2
O
-
Not in use
Open
3
Vss
-
-
4
OSC2
O
-
10MHz ceralock
5
OSC1
I
-
10MHz ceralock
6
TEST
I
-
Not in use
37
KX-NT136RU
Pin
No.
Terminal Name
I/O Setting
Pull-up
Processing
Contents of Control
Remark
7
Vcc
-
-
Power terminal
+3.3V
8
Reset/
I
-
Reset input
Low active
9
P20/IRQ4
I
Built-in
KEY_HOOK
Low:push
10
P21/SCK1
I
Built-in
KEY_CONF
Low:push
11
P22/SI1
I
Built-in
KEY_FWD
Low:push
12
P23/SO1
I
Built-in
KEY_PAUSE
Low:push
13
P24/SCK1
I
Built-in
KEY_ICM
Low:push
14
P25/RxD
I
-
Receive from IC1
19200bps 8bit NP
15
P26/TxD
O
-
Transmit to IC1
19200bps 8bit NP
16
P27/IRQ0
I
-
nDETPDN
Low:power supply under
6V
6V
17
P17/IRQ3
I
-
KEYIN[7]
18
P16/IRQ2
I
-
KEYIN[6]
19
P15/IRQ1
I
-
KEYIN[5]
20
P14
I
-
KEYIN[4]
21
P13/TMIG
I
-
KEYIN[3]
22
P12/TMOFH
I
-
KEYIN[2]
23
P11/TMOFL
I
-
KEYIN[1]
24
P10/TMOW
I
-
KEYIN[0]
25
PA3
O
-
LED_CONF
HI:active
26
PA2
O
-
LED_FWD
HI:active
27
PA1
O
-
LED_ICM
HI:active
28
P50/WKP0
O
-
KEYOUT[0]
29
P51/WKP1
O
-
KEYOUT[1]
30
P52/WKP2
O
-
KEYOUT[2]
31
P53/WKP3
O
-
KEYOUT[3]
32
P54/WKP4
O
-
KEYOUT[4]
33
P55/WKP5
O
-
KEYOUT[5]
34
P56/WKP6
O
-
C_LED[8]
Low:active
35
P57/WKP7
I
-
Connect to GND
DG
36
P60
I
Built-in
KEY_1
Low:push
37
P61
I
Built-in
KEY_2
Low:push
38
P62
I
Built-in
KEY_3
Low:push
39
P63
I
Built-in
KEY_4
Low:push
40
P64
I
Built-in
KEY_5
Low:push
41
P65
I
Built-in
KEY_6
Low:push
42
P66
I
Built-in
KEY_7
Low:push
43
P67
I
Built-in
KEY_8
Low:push
44
P70
O
-
C_LED[0]
Low:active
45
P71
O
-
C_LED[1]
Low:active
46
P72
O
-
C_LED[2]
Low:active
47
P73
O
-
C_LED[3]
Low:active
48
P74
O
-
C_LED[4]
Low:active
49
P75
O
-
C_LED[5]
Low:active
50
P76
O
-
C_LED[6]
Low:active
51
P77
O
-
C_LED[7]
Low:active
52
P80
O
-
R_LED[0]
HI:active
53
P81
O
-
R_LED[1]
HI:active
54
P82
O
-
R_LED[2]
HI:active
55
P83
O
-
R_LED[3]
HI:active
56
P84
O
-
R_LED[4]
HI:active
57
P85
O
-
R_LED[5]
HI:active
58
P86
O
-
LED_ANS
HI:active
59
P87
O
-
LED_DIAL
HI:active
60
TONED
O
-
Not in use
Not in use
61
VTref
I
-
Not in use
Not in use
62
PB7/AN7
I
-
KEY_ANS
Low:push
63
PB6/AN6
I
-
KEY_DIAL
Low:push
64
CVcc
I
-
Internal electrical power source
Connecting 0.1uF to GND
38
KX-NT136RU
10.5. IC301 (DC-CON)
Pin
No.
Terminal Name
I/O Setting
Pull-up
Processing
Contents of Control
Remark
1
GND
-
-
Digital GND
2
SW
O
-
The switch pin is the emitter of the on-chip power
NPN switch.
NPN switch.
3
NC
-
-
No Internal Connection.
4
VIN
I
-
This is the collector of the on-chip power NPN switch.
5
NC
-
-
No Internal Connection.
6
BOOST
I
-
The BOOST pin is used to provide a drive voltage
higher than the input voltage to the internal bipolar
NPN power switch.
higher than the input voltage to the internal bipolar
NPN power switch.
7
NC
-
-
No Internal Connection.
8
GND
-
-
Digital GND
9
GND
-
-
Digital GND
10
BIAS
I
-
The BIAS pin is used to improve efficiency when
operating at higher input voltages and light load
current.
operating at higher input voltages and light load
current.
11
VC
O
-
The VC pin is the output of the error amplifier and the
input of the peak switch current comparator.
input of the peak switch current comparator.
12
FB/SEN
I
-
The feedback pin is used to set the output voltage
using an external voltage divider that generates 1.22V
at the pin for the desired output voltage.
using an external voltage divider that generates 1.22V
at the pin for the desired output voltage.
13
NC
-
-
No Internal Connection.
14
SYNC
I
-
The SYNC pin is used to synchronize the internal
oscillator to an external signal
oscillator to an external signal
15
nSHDN
I
Built-in
The SHDN pin is used to turn off the regulator and to
reduce input drain current to a few microamperes.
reduce input drain current to a few microamperes.
16
GND
-
-
Digital GND
39
KX-NT136RU
10.6. IC302 (PoE 802.3af)
Pin
No.
Terminal Name
I/O Setting
Pull-up
Processing
Contents of Control
Remark
1
NC
-
-
No Internal Connection.
2
Rclass
I
-
Class Select Input.
3
NC
-
-
No Internal Connection.
4
Vin
I
-
Power Input. Tie to system -48V through the input
diode bridge.
diode bridge.
5
Vout
O
-
Power Output. Supplies -48V to the PD load through
an internal power MOSFET that limits input current.
VOUT is high impedance until the input voltage rises
above the turn-on UVLO threshold.
The output is then current limited. See Applications
Information.
an internal power MOSFET that limits input current.
VOUT is high impedance until the input voltage rises
above the turn-on UVLO threshold.
The output is then current limited. See Applications
Information.
6
nPWRGD
O
-
Power Good Output , Open-Drain.
Signals to the PD load that the LTC4257-1 MOSFET
is on and that the PD’s DC/DC converter can start
operation. Low impedance indicates power is good.
PWRGD is high impedance during detection,
classification and in the event of a thermal overload.
PWRGD is referenced to VIN.
Signals to the PD load that the LTC4257-1 MOSFET
is on and that the PD’s DC/DC converter can start
operation. Low impedance indicates power is good.
PWRGD is high impedance during detection,
classification and in the event of a thermal overload.
PWRGD is referenced to VIN.
7
NC
-
-
No Internal Connection.
8
GND
-
-
Digital GND
40
KX-NT136RU
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