Table 4 OEM Interface Signal Description
Signal
Pin
Type
Description
TPRX+, TPRX-
1,3
Differential
input
Ethernet Receive Data primary
TPTX+, TPTX-
2,4
Differential
output
Ethernet Transmit Data primary
AVDD
7
Power
Ethernet Power Output to transformer
center tap
UART0_RXD
9
Input
Serial Port 1 Receive Data
UART0_TXD
11
Output
Serial Port 1 Transmit Data
UART0_RTS
15
Output
Serial Port 1 Request To Send
UART0_CTS
16
Input
Serial Port 1 Clear to Send
UART1_RXD
22
Input
Serial Port 2 Receive Data
UART1_TXD
21
Output
Serial Port 2 Transmit Data
UART1_RTS
17
Output
Serial Port 2 Request To Send
UART1_CTS
18
Input
Serial Port 2 Clear to Send
GPIO1, GPIO2,
GPIO3, GPIO4,
GPIO5, GPIO6,
GPIO7, GPIO8,
GPIO9, GPIO10
29, 31, 35, 36,
39, 40, 5, 6,
10, 12
Input/Output
General Purpose Input/Output Signals 1-
10, User defined (GPIO7 is normally used
for the Test Button and GPIO8-GPIO10
are normally used for the status LEDs)
MANF_TEST
25
Output
For Manufacturing use only. Do not
Connect.
MANF_TEST
30
Output
For Manufacturing use only. Do not
Connect.
MANF_TEST
32
Input
For Manufacturing use only. Do not
Connect.
MANF_TEST
26
Output
For Manufacturing use only. Do not
Connect.
RESET_N
24
Output
Power-on Reset (low true)
+3.3VDC
8, 14, 27, 33
Power
Power VCC Input
GND
13, 19, 20, 23,
28, 34, 37, 38
Power
Power Ground
Part Number 40183-101
Silex SX-550 Developer's Guide
Page 10
Summary of Contents for SX-550
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