(No.RA021<Rev.001>)1-9
2.4.2 Interface unit (XC3-0090-20) (KRK-15B)
CN35
1
SP+
O Speaker output plus
2
SP-
O Speaker output minus
3
GND
- Ground
4
SB
O Switched power supply
CN37
1
NC (IGN)
- No connection (Ignition sense
input)
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
signal
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
Pin No.
Name
I/O
Function
40
TXD
O Serial data output
41
/PTT
I PTT input
42
/PSW
I Detection signal input of power
switch
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
Pin No.
Name
I/O
Function
CN1
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
switch
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
Pin No.
Name
I/O
Function
