BECKHOFF ET1100 - Manual (Page 38)

Pin Description
III-24 Slave Controller – ET1100 Hardware Description
3.8 Physical Ports and PDI Pins
The ET1100 pin out is optimized in order to achieve an optimum of size and features. To obtain this,
there is a number of pins where either communication or PDI functionality can be assigned to. Number
and type of the communication ports might reduce/exclude one or more PDI possibilities.
The physical communication ports are numbered from port 0 to port 3. Port 0 and port 1 do not
interfere with PDI pins, while port 2 and port 3 might overlap with PDI[39:16] and therefore limit the
number of choices for the PDI.
Pin configuration for ports will overwrite pin configuration for PDI. Therefore, number and type of ports
should be configured first.
The ET1100 has 40 PDI pins, PDI[39:0]. They are structured in 4 groups: PDI[15:0] (PDI byte 0/1),
PDI[16:23] (PDI byte 2), PDI[24:31] (PDI byte 3), and PDI[32:39] (PDI byte 4).
Possible Physical Port / PDI combinations
Table 31: Combinations of physical ports and PDI
Async. µC Sync. µC SPI
Digital I/O
with CTLR_STATUS_MOVE=
0 1
2 ports
or
3 ports with min. 1xEBUS
8 Bit
16Bit
8 Bit
16Bit
SPI
+32 Bit GPI/O
32Bit I/O
+control/status signals
3xMII, 0xEBUS 8Bit 8Bit
SPI
+24 Bit GPI/O
32Bit I/O
24Bit I/O
+ control/status
signals
4 ports, min. 2xEBUS - -
SPI
+16Bit GPI/O
24Bit I/O
+ control/status signals
3xMII, 1xEBUS - -
SPI
+16Bit GPI/O
24 Bit I/O
16Bit I/O
+ control/status
signals
4xMII - -
SPI
+8Bit GPI/O
16Bit I/O
8Bit I/O
+ control/status
signals