Zilog Z8F0411 Uživatelský manuál stáhnout pdf (Strana 76)

MDS General-Purpose Board Development Kit

User Manual

UM016905-1207 Appendix—MDS-PM Board Pin Maps

Serial Port Control

J2 (DIS_RS232) on the processor module is don’t care when the

module is plugged into the MDS-GP board. The console RS-232

driver U1 is always disabled because the –DIS_RS232 signal is

grounded by MDS-GP board via JP2-50.

J3(DIS_IrDA) on the processor module is to be removed to allow the

MDS-GP board to control the IrDA module. If this jumper is installed,

IrDA on the processor module is always disabled.

Jumper J2 Signals

Enable only one serial port function per interface (COM1 or COM2).

•

RS232_COM1_ENABLE—J2 pins 1, 2

•

RS485_COM1_ENABLED—J2 pins 3, 4

•

IrDA ENABLE (COM1)—J2 pins 5, 6

•

RS232_GPS_COM2_ENABLED—J2 pins 7, 8

•

RS232_COM2_ENABLE—J2 pins 9, 10

•

RS232_RF_COM1_ENABLED—J2 pins 11, 12

•

SOFTWARE_UART_COM1_ENABLED—J2 pins 13, 14

C Bus Expander U2 Signals For Serial Port Control

U2 is an I

C bus expander that can be used via software to control the sig-

nals on jumper J2. If the U2 I

C expander is to be used, ensure all jumpers

are removed from J2. U2 powers up with all pins in input mode.

The U2 bus expander I

C address is 0100010 R/W.

•

GPS_ENABLE—D0 = 0

•

IrDA ENABLE—D1 = 0

•

RS485 ENABLE—D2 = 0

Note:

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Zilog Z8F0411 Uživatelský manuál Strana 76