Figure 2-17 Evaluation Board Schematic, Sheet 3 Of 6 - Lantronix xPico 110 Integration Manual

Port 2 Headers
Install Jumpe rs from pins 1 to 2 for DB9 Se rial Port 1
Install Jumpe rs from pins 2 to 3 for USB/Se rial Port
JP8
TXDB 1
2
p2
p2 TXD2
3
p7 USB_RX p7
HEADER 3
C28
0.22uF
C29
0.22uF
C30
0.22uF
C31
0.22uF
xPico® 110 Embedded Device Server Integration Guide

Figure 2-17 Evaluation Board Schematic, Sheet 3 of 6

JP9
RXDB 1
2
RXD2
3
USB_TX
HEADER 3
C27
0.1uF
R22
1M
2 UART_ACT1
1 3 UART_ACT2
UART_ACT3
UART_ACT4
D1
UART_ACT5
1N914
UART_ACT6
UART_ACT7
UART_ACT8
R25
1M
2
1 3
D2
1N914
R30
1M
2
1 3
D3
1N914
R31
1M
2
1 3
D4
1N914
3V3 3V3
C21 C22
4.7uF 0.1uF C23 0.1uF, 50V
C24
0.1uF, 50V
TXDB
RXDB
RS-232 Activity LEDs
3V3
U9
2 18 TX1_LED
1A1 1Y 1
16 4
1Y 2 1A2
6 14 RX1_LED
1A3 1Y 3
12 8
1Y 4 1A4
11 9
2A1 2Y 1
7 13
2Y 2 2A2
15 5
2A3 2Y 3
3 17
2Y 4 2A4
1
1OE
19
2OE
R27 R28 74LV244
1K 1K
RX2_LED
Serial Driver 2 and Serial LEDs
2: Functional Description
3V3
RS232
U8
2 6
C25 0.1uF, 50V
V+ V-
1 4
C1+ C2+
C26
3 5
0.1uF, 50V
C1- C2-
TTL RS232
11 14 TX2_232
L9
T1IN T1OUT
10 7
T2IN T2OUT
12 13 RX2_232
L11
R1OUT R1IN
9 8
R2OUT R2IN
SP3232E
TXD1 p2,3
RXD1 p2,3
LED8 3V3
GRN
TX1 LED
4 3
R23 220
RX1 LED
2 1
R24 220
ORA
SML521MDW
R26 LED9
GRN
220
TX2 LED
4 3
TX2_LED
RX2 LED
2 1
TXD2
ORA
R29 SML521MDW
220
RXD2
SERIAL PORT 2
JP18
1
BLM15BB220SN1D
2
3
BLM15BB220SN1D
HEADER 3
21