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Ethernet LED Connections
The E_LINKLED and E_ACTLED signals are driven by the PHY. They are active low.
Recommended connections on the target board are shown below.
Warning:
and E_ACTLED signals to set up the PHY's LED Indicator Mode as
Ethernet Link and Activities at Power On Reset (POR). Do not connect
these two signals with any pull-down resistors as they may corrupt the
logic level on these two signals at POR, causing undesired operation.
Serial Input/Output
The unit has two serial ports compatible with RS232 serial standards at data rates
up to 230 Kbps. Serial Port 1 can also be configured as RS422/485, but Serial Port 2
cannot. The serial I/O signals are 3.3V CMOS logic level. Serial signals can be
connected to the OEM CPU/UART or RS232/422/485 serial transceivers. For
evaluation and prototype work, it is convenient to have an external RS232 interface
that can connect to the serial port on a PC. The MatchPort Demo Board has
RS232/422/485 transceivers to implement this external interface. If desired, use the
CPs to create a DTE or DCE-style interface using any available CPs. To create these
interfaces, connect the signals according to the tables below.
Note:
CPx and CPy are any of the available CPs.
MatchPort AR
Signal
(Logic)
RXD1
TXD1
RTS1
CTS1
CPx
CPy
MatchPort AR™ Integration Guide
Figure 2-4. Recommended LED Connections
The MatchPort AR has two 4.7K pull-ups on the E_LINKLED
Table 2-1. RS232 Connections
Description
Data In
Data Out
H/W Flow Control Output
H/W Flow Control Input
Modem Control Input
Modem Control Output
2:Description and Specifications
DCE Connector
DTE Connector
DB9
DB25
Signal
DB9
2
3
RXD1
3
2
TXD1
7
4
RTS1
8
5
CTS1
1
8
DCD
4
20
DTR
DB25
Signal
3
2
TXD1
2
3
RXD1
8
5
CTS1
7
4
RTS1
4
20
DTR
1
8
DCD
11
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