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PB-SIO4A Configuration

ID 19958, Rev. 0300 Page 3 - 3® PEP Modular Computers GmbH

3. Configuration

3.1 PB-SIO4A Address Map and ID Byte

The PB-SIO4A is addressed (odd byte access) by using the carrier board base address

and one of the following offsets for the piggyback location:

Piggyback location A ( the upper position on the carrier board)

Base Address + $01 DUART1

Base Address + $21 DUART2

Base Address + $41 ID Byte

Piggyback location B ( the lower position on the carrier board)

Base Address + $81 DUART1

Base Address + $A1 DUART2

Base Address + $C1 ID Byte

The PB-SIO4A has an ID Byte of $E7 (RS422/RS485).

3.2 VMEbus Interrupts

Each DUART device is able to issue an interrupt request (*IRQ) to the carrier board. In

the event of simultaneous interrupt requests those from DUART #1 have priority over

those from DUART #2.

The interrupt level is set by the carrier board. See the carrier board documentation for

setting of the level. The interrupt vector itself is provided by the DUART.

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Kontron PB-SIO4A Manuale Utente Pagina 25