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MPC562BC 10/31/02

I/O Ports and Options

COM1

COM-1 serial port with female DB9 connector is available for RS232 operation of the MPC562 SCI channel 1. MPC562 SCI

channel 2 is provided with RS232 levels at the TX2 and RX@ test Pad locations. COM1 port provides direct connection to a host

PC with a straight thruogh type 9 pin serial cable. Following is the standard pin out for the 9 pin serial connector (DB9-S):

DB9-S connections:

Pin 1, 4, and 6 = group connected for DTR/DSR flow control null back to host

Pin 2 = TXD output (RS232 level)

Pin 3 = RXD input (RS232 level)

Pin 5 = Ground/Vss/Common

Pin 7 and 8 = group connected for RTS/CTS flow control null back to host

Pin 9 = open

Notes:

1. COM ports provide connection pads 1 – 9 behind the DB9 cable connector so the user may modify operation of the serial

connections. Each connection pad is numbered for the associated serial connector pin. Each connection pad can be isolated

from the others if grouped above, by cutting the associated trace to the pad on the bottom side of the board.

2. RS232 translators available to SCI channel 2 may be applied to the COM port by isolating the MPC562 SCI signals to the

RS232 transceiver and applying the associated RS232 level input or output. User should refer to the schematic diagrams of

the board to make sure correct signals and connections are isolated and reconnected for the new application.

AT1/2, AR1/2 - SCI Channel to Serial Port Configuration

The Axx cut-away options provide a means of isolating the individual SCI RXD and TXD signals from the RS232 interface

translator device (U6) and COM port operation. This allows the SCI channels to be used for other purposes, possibly on the QSM

port connector. Following is a table of the SCI signals and AT/R_ positions used for enabling RS232 and COM port operation. Note:

2mm pin header maybe installed after cutaways are cut to allow jumper option.

AT_ Position SCI Channel Signal RS232 COM Port Connection COM_PORT Signal Direction to RS232

interface translator

AT1

SCI_A_ TXD1 COM-1 Output

AR1

SCI_A_ RXD1 COM-1 Input

AT2

SCI_A_ TXD2 TX2 Test Pad Output

AR2

SCI_A_ RXD2 RX2 Test Pad Input

CAN PORT and Options

The MPC562BC board provides one CAN transceiver with I/O port: CAN_PORT. The CAN_PORT is supported by the Power Oak

CAN transceiver. The MPC562 CAN_A port is directly interfaced to the Power Oak transceiver and can not be isolated easily. The

MPC562 CAN_B and C ports are provided on the QSM_PORT and MGPIO_PORT respectfully.

CAN_PORT: The MPC562 CAN_A channel transceiver is provided by the Power Oak (PC33394). This transceiver has

software selectable options via the A_QSPI0 channel which may communicate with the Power Oak device. See the

PC33394 data sheet for details. A 4.7K ohm pull-up is provided on the CAN_A TX signal. Options S6 – S9 are provided

near the Power Oak device to allow isolation of the QSPI signals to the Power Oak.

CAN_PORT Connector

These ports provide the CAN transceiver input and output connection to the CAN bus. The bias or termination for the CAN bus is

provided on the EVB board but not populated. If required, the user must install these components in the RAx, RBx, or RCx locations

near the respective CAN port. Following are the pin connections for the ports:

Pin 1 = CAN-Hi level signal

Pin 2 = CAN-Lo level signal

Pin 3 = Ground or common (this is required for proper return path on CAN bus)

Pin 4 = +5Vsupply for remote use or bias of CAN bus.

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Motorola MPC564EVB Manuel d'utilisateur Page 12

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