Cypress Semiconductor CY62148ESL Guia do Utilizador descarregar pdf (Página 13)

C M M - 52259 J U N E 1 1 , 2 0 1 0

U S E R G U I D E

Fast Ethernet Controller (FEC)

The MCF52259 internal Media Access Controller (MAC) supports 10/100 Mbps Ethernet /

IEEE802.3 network connections. User application must configure the MAC for Media Inde-

pendent Interface (MII) operation before use. The MAC supports both full- and half-duplex op-

eration.

UART

The CMM-52259 applies 3 RS-232, UART channels.

RS-232

A RS-232 physical layer transceiver (PHY) is applied on UART0 to support serial communica-

tions. UART1 and UART2 signals are available on the MCU_PORT connector for use with off-

board PHY’s. A standard “Berg” style pin header and an IDC to DB-9 adapter cable complete

the UART0 connections. The on-board PHY is enabled while power is applied to the board.

Figure 6 below shows signal connections on UART0.

Figure 6: UART0 Signal Connections

MCU Port Signal

PHY Signals

COM

CONECTOR

COMMENTS

J5-1

7, 2

UTXD0/PUA0

TXD

J5-3

pull-up

URXD0/PUA1

RXD

J5-5

J5-7

1, 2

GND

J5-9

J5-2

1, 7

UCTS0*/PUA3

CTS

J5-4

URTS0*/PUA2

RTS

J5-6

pull-down

J5-8

J5-10

NOTE:

The COM (J5) connector is placed too close to the BDM_PORT connector. To

use both the COM cable and the BDM cable, first install the COM cable then

install the BDM cable.

CAN

The CMM-52259 applies a high-speed controller area network (CAN) port. The Phillips,

PCA82C250 physical layer transceiver (PHY) provides the interface between the MCF52259

CAN controller port and the physical CAN bus. The PHY connects to the differential CAN bus

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