BECKHOFF CB2051 - Manual (Page 16)

Chapter: Connectors PISA Slot
page 16 Beckhoff New Automation Technology CB2051
3.4 PISA Slot
The CB2051 module requires a backplane board in which it is inserted using the PISA slot. This slot
combines PCI and ISA signals in one single connector which is useful in situations where limited space is
an issue. The CB2051 currently supports only PCI.
N
OTE
Please note the unusual pin numbering scheme of the PISA slot. There is an "up row" (for ISA signals)
and a "low row" (for PCI signals). The former is divided into segments A through D while the latter is
divided into segments E through H (cf. the illustration above).
Pinout "up row":
Description Name Pin Name Description
IO channel check IOCHK# A1 B1 GND ground
system data 7 SD7 A2 B2 RSTDRV reset drive
system data 6 SD6 A3 B3 VCC 5 volt supply
system data 5 SD5 A4 B4 IRQ9 interrupt request 9
system data 4 SD4 A5 B5 -5V -5 volt
system data 3 SD3 A6 B6 DRQ2 DMA request 2
system data 2 SD2 A7 B7 -12V -12 volt supply
system data 1 SD1 A8 B8 WS0# wait state 0
system data 0 SD0 A9 B9 12V 12 volt supply
IO channel ready IOCHRDY A10 B10 GND ground
address enable AEN A11 B11 SMEMW# memory write below 1MB
system address 19 SA19 A12 B12 SMEMR# memory read below 1MB
system address 18 SA18 A13 B13 IOW# IO write
system address 17 SA17 A14 B14 IOR# IO read
system address 16 SA16 A15 B15 DACK3# DMA acknowledge 3
system address 15 SA15 A16 B16 DRQ3 DMA request 3
system address 14 SA14 A17 B17 DACK1# DMA acknowledge 1