Uart Register Structure For Mu860 Chip - Moxa Technologies CA Series User Manual

CA Series PC/104

UART Register Structure for MU860 chip

NOTE For a detailed UART register description, please see the "UART Datasheet" section..
UART register address = I/O base address + (port-1) *8

For example, if the base address is 0x180:
The first port's UART registered I/O address is 0x180+(1-1)*8 = 0x180
The second port's UART registered I/O address is 0x180+(2-1)*8 = 0x188
IRQ Vector Register Structure

Bit Value
0
1
All serial ports on the same Moxa board use the same IRQ. Check the vector to determine which port issues the
interruption. You can also get the information by querying the IIR of each port.
The first registered I/O address is 0x180,
The second registered I/O address is 0x181, .....
The first registered I/O address is 0x188,
The second registered I/O address is 0x189, ...
Status
Interrupt pending. Please read the UART register to get the detail interrupt
information *.
No interrupt pending.
Smartio/Industio Programming Guide
5-3