Zilog Z8F0411 Manual do Utilizador descarregar pdf (Página 47)

MDS General-Purpose Board Development Kit

User Manual

UM016905-1207 Appendix—MDS-PM Board Pin Maps

Serial Port Control

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

signals 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

•

RS232_COM1_ENABLE—D3 = 0

•

RS232_COM2_ENABLE—D4 = 0

•

RF_ENABLE—D5 = 0

•

SW_UART_ENABLE—D6 = 0

•

Spare—D7

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 82 83

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