Kenwood KRK-14H Service Manual page 9

Pin No. Name I/O
1 SP+ O Speaker output plus
2 SP- O Speaker output minus
3 GND - Ground
4 SB O Switched power supply
1 NC (IGN) - No connection (Ignition sense
2 NC - No connection
3 GND - Ground
4 54M O 5.4V output
5 GND - Ground
6 GND - Ground
7 18M O 1.8V output
8 D[15] I/O LCD driver data output
9 D[14] I/O LCD driver data output
10 D[13] I/O LCD driver data output
11 D[12] I/O LCD driver data output
12 D[11] I/O LCD driver data output
13 D[10] I/O LCD driver data output
14 D[9] I/O LCD driver data output
15 D[8] I/O LCD driver data output
16 D[7] I/O LCD driver data output
17 D[6] I/O LCD driver data output
18 D[5] I/O LCD driver data output
19 D[4] I/O LCD driver data output
20 D[3] I/O LCD driver data output
21 D[2] I/O LCD driver data output
22 D[1] I/O LCD driver data output
23 D[0] I/O LCD driver data output
24 /CS_LCD O LCD driver chip-serect signal
25 A[23] O LCD driver data/command switch
26 /WR_LCD O LCD driver WR signal
27 /RD_LCD O LCD driver RD signal
28 PRST O LCD driver reset signal
29 /KEYINT I Key state change signal
30 I2CCK O I2C serial clock
31 I2CDT I/O I2C serial data
32 GND - Ground
33 USB_D- I/O USB0 PHY data minus
34 USB_D+ I/O USB0 PHY data plus
35 GND - Ground
36 33M O 3.3V output
37 DM/KVL I/O MIC data detection
38 GND - Ground
39 RXD I Serial data input
Function
CN35
CN37
input)
signal
Pin No. Name I/O
40 TXD O Serial data output
41 /PTT I PTT input
42 /PSW I Detection signal input of power
43 AFO+ O AF signal output plus
44 AFO- O AF signal output minus
45 MIC I MIC signal input
46 ME - MIC ground
47 NC - No connection
48 NC - No connection
49 NC - No connection
50 GND - Ground
2.4.2 Interface unit (XC3-0090-20) (KRK-15B)
Pin No. Name I/O
1 GND - Ground
2 R_SET0 O Radio setting signal 0
3 R_SET1 O Radio setting signal 1
4 R_SET2 O Radio setting signal 2
5 ME - MIC ground
6 MIC O MIC signal output
7 AFi- I AF signal input minus
8 AFi+ I AF signal input plus
9 /PSW O Detection signal output of power
10 NC - No connection
11 TXD I Serial data input
12 RXD O Serial data output
13 GND - Ground
14 NC - No connection
15 33M I 3.3V input
16 GND - Ground
17 NC - No connection
18 NC - No connection
19 GND - Ground
20 I2CDT I/O I2C serial data
21 I2CCK O I2C serial clock
22 /KEYINT O Key state change signal
23 /PRST I Reset signal
24 NC - No connection
25 NC - No connection
26 NC - No connection
27 NC - No connection
28 NC - No connection
Function
switch
Function
CN1
switch
(No.RA021<Rev.001>)1-9