BECKHOFF ET1100 - Manual (Page 91)

PDI description
Slave Controller – ET1100 Hardware Description III-77
The following figure shows how a 32 bit µController can be connected with the EtherCAT synchronous
16 bit µController interface using Byte Select signals:
CLK CPU_CLK_IN
CS
TS
ADR[15:1]
DATA[31:24]
BS3
BS2
TA
CS
TS
ADR[15:1]
DATA[7:0]
A[0]
BHE
TA
ADR[0]
32 bit µController
sync
EtherCAT device
open
DATA[23:16] DATA[15:8]
R/W RD/WR
OE open
IRQ IRQ
A[23:16] open
BS[1:0] open
D[15:0] open
TSIZ open
General purpose input EEPROM_Loaded
optional
Figure 29: Synchronous 32 bit µController connection using Byte Select