765300 - Pyxis User Manual
Page 11
7. REGISTER MAP
Note: These registers can only be accessed if the Pyxis-MM is on the PC-104 bus.
Base + 0
Read
INTERRUPT STATUS
Bit No.
7
6
5
4
3
2
1
0
Name
X
X
X
X
PRT2_LB PRT1_LB
INTB
INTA
Definitions:
INTB
Port 2 has a pending IRQ.
INTA
Port 1 has a pending IRQ.
Note: Used when both ports are sharing the same IRQ line. The interrupt service routine must be able
to read this register to determine which port needs servicing.
Base + 0
Write
TRANCEIVER/UART TEST
Bit No.
7
6
5
4
3
2
1
0
Name
X
X
X
X
PRT2_LB PRT1_LB
X
X
Definitions:
PRT2_LB Connects RS-232 signals from transceiver 2 to UART 2. Mainly for testing the boards
functions. Only TX, RX, RTS, CTS, DTR, and DSR are connected.
PRT1_LB Connects RS-232 signals from transceiver 1 to UART 1. Mainly for testing the boards
functions. Only TX, RX, RTS, and CTS are connected.
Base + 1
Read/Write
WIRELESS MODEM CONTROL
Bit No.
7
6
5
4
3
2
1
0
Name
X
X
X
X
0
0
DOUT
SLEEP
Definitions:
DOUT
One bit digital out register.
SLEEP
Set this bit to put wireless modem into sleep mode for lower power consumption.
