Datasheet

ZEUS Embedded Linux Development Kit Quickstart Hardware configuration

Hardware configuration

Serial ports

There are 7 serial ports on the ZEUS. Three ports are connected directly to the

PXA270 processor and the remaining ports are provided via a quad UART. In AEL

Embedded Linux, the ports have the following designations:

Serial port Device Source Connector Comment

COM1 /dev/ttyS0 Quad UART J11 Default console

COM2 /dev/ttyS1 Quad UART J15 RS232

COM3 /dev/ttyS2 Quad UART J18 or J19

J18 is for RS485/422

J19 is for RS232

COM4 /dev/ttyS3 Quad UART J19 RS485/422

COM5 /dev/ttyS4 PXA270 FFUART J23 Wireless modem

COM6 /dev/ttyS5 PXA270 BTUART J21 ZigBee option

COM7 /dev/ttyS6 PXA270 STUART J23 GPS

For more information on the hardware configuration of the serial ports, please refer to

the section Serial COM ports in the ZEUS Technical Manual.

PC/104

The PC/104 bus on the ZEUS is attached via the second PCMCIA controller built in to

the PXA270 processor.

The PC/104 I/O address space is available at physical address 0x30000000 (virtual

address 0xF1000000). This means that a PC/104 card that has been configured at I/O

address 0xXXX is available at virtual address 0xF1000XXX. This virtual address is the

correct value to use when configuring a device driver for that card, rather than the

associated physical address.

The PC/104 memory address space is available at physical address 0x3C000000. This

means that a PC/104 card that has been configured for memory address 0xXXXX is

available at physical address 0x3C00XXXX. It is the responsibility of the driver to map

this address into the kernel's virtual address space before use. The PC/104 interrupts

are mapped as shown in the following table: