M 5 2 2 5 9 D E M O C O M
S E P T E M B E R 1 0 , 2 0 0 8
U S E R G U I D E
7
CONNECTORS
J3
An Ethernet connector at J3 supports 10/100 Ethernet network connectivity. The connector is
arranged tab-down and includes integrated magnetics. The Ethernet Port applies a Micrel
KZS8041 10/100 Ethernet PHY configured for MII operation only. The PHY connects to the
Fast Ethernet Controller (FEC) signals from the MCF52259 MCU on the M52259DEMOMCU
board.
Two, green, status indicators are provided to indicate network traffic connection status
Figure 1: Ethernet Status Indicators
SPD
ON – 100BaseT connection, OFF – 10BaseT connection
LNK_ACT
ON – indicates network traffic activity
UART0
A right angle, 9-pin Dsub connector supports serial communications to the target MCU on the
M52259DEMOMCU boards. The RS-232 PHY is connected to UART 0 on the target MCU. A
ferrite bead on shield ground provides conducted immunity protection. Handshaking signals
RTS and CTS are also routed to the target MCU. RTS is biased for handshaking during 2-wire
operation.
Table 1: COM Connections
MCU Port
COM Signal
UART0 CON-
NECTOR
UTXD0
TXD
UART0 – 5
URXD0
RXD
UART0 – 7
URTS0
RTS
UART0 – 8
UCTS0
CTS
UART0 – 7
CAN_PORT
A 3-pos connector at CAN_PORT provides CAN port access for the M52259DEMOCOM. A
TJA1050 device provides the CAN PHY interface. This device is capable of communicating up
to 1 Mbaud.
Differential CAN signal termination is applied. A 120-ohm termination resistor with option
jumper allows termination to be applied or removed. The CANT_EN option jumper applies or
removes the CAN termination.
