2: Functional Description
xPico® 110 Embedded Device Server Integration Guide
20
Figure 2-16 Evaluation Board Schematic, Sheet 2 of 6
Note:
R10, R11, R19, R46, and R56 could be 0 ohm resistors, ferrites, or ceramic capacitors for EMC purpose, recommended
0.001 uF.
Serial Driver 1
CP3
p2
CP4
p2
CTS1
p2
RTS1
p2
C16
0.1uF, 50V
Leave open for RS232 mode
Install for RS485/RS422
3V3
U4
NC7SZ02
1
2
4
5
3
2WIRE_4WIRE_SEL
MODE (MO, M1, M2)
Mode 001 = RS232 (Default)
Mode 101 = 4 Wire (Full duplex)
Mode 100 = 2 Wire (Half Duplex)
3V3
RS485_RS232_SEL
RTSA
CTSA
DCDA
DTRA
3V3
3V3
C17
0.1uF
This signal is low in RS232 mode
JP11
1
2
RS232_485_SEL
JP12
1
2
Install Jumpers to connect to DB9 Serial Port 1
3V3
3V3
3V3
3V3
2WIRE_4WIRE_SEL
Leave open for RS232 or 4 wire mode
Install for 2-wire mode
R19
DNP_0
R16
10k
R17
10k
R18
10k
L6
DNP
DCD1_232
C11
4.7uF
CTS1_232/RX-485
RX1_232/RX+485
DCD1_232
L1
BLM15BB220SN1D
L2
BLM15BB220SN1D
L4
BLM15BB220SN1D
L3
BLM15BB220SN1D
L5
BLM15BB220SN1D
L7
BLM15BB220SN1D
TX1_232/TX-485
DTR1_232
CTSA
RX1_232/RX+485
RTS1_232/TX+485
CTS1_232/RX-485
RTSA
TXDA
RTSA
3V3
3V3
SERIAL_RTS1
U18
PI74ST1G125
2
4
1 3
5
DTRA
3V3
RS232_485_SEL
RS485_RS232_SEL
This signal is low in RS485 mode
This signal is low in RS232 mode
R55
10k
RXDA
C14
0.1uF, 50V
U19
PI74ST1G125
2
4
1 3
5
DCDA
C15
0.1uF, 50V
DTR1_232
RS485 Mode TX connector
Inverted from SP336 so swap
TX and RTS when in RS485 mode.
TXDA
3V3
3V3
U16
PI74ST1G125
2
4
1 3
5
SERIAL_TX1
3V3
RS232_485_SEL
RS485_RS232_SEL
This signal is low in RS485 mode
This signal is low in RS232 mode
R54
10k
U17
PI74ST1G125
2
4
1 3
5
C13
0.1uF, 50V
RS232/RS485/RS422
C12
0.1uF
TX1_232/TX-485
RTS1_232/TX+485
SERIAL_RTS1
SERIAL_TX1
J3
DE9-MALE
5
9
4
8
3
7
2
6
1
11
10
JP17
HEADER 6X2
2
4
6
8
10
12
1
3
5
7
9
11
SERIAL PORT 1
3V3
C73
0.1uF
3V3
C70
0.1uF
3V3
C71
0.1uF
3V3
C72
0.1uF
TXD1
p2,4
TXDA
RXD1
p2,4
RXDA
U3
SP336E
T4_in_TXENB
1
Mode_1
2
T4_out_TXB-
3
T3_
4
V
CC5
5
T1_
6
T2_out_TXA-
7
C1+
9
V+
10
C2+
11
C1-
12
C2-
13
V-
14
R1
15
R2_in_RXA-
16
R3
17
R4_in_RXB-
18
R1_out_RXA
19
R2_out
20
R3_out_RXB
21
R4_out
22
Mode_2
23
Mode_0
24
SLEW
25
T1_in_TXA
26
T2_in_TXENA
27
T3_in_TXB
28
GN
D
8