BECKHOFF ET1100 - Manual (Page 94)

PDI description
III-80 Slave Controller – ET1100 Hardware Description
The following figure shows how a 32 bit µController can be connected with the EtherCAT synchronous
16 bit µController interface using SIZ signals:
CLK CPU_CLK_IN
CS
TS
ADR[15:0]
DATA[31:24]
TA
CS
TS
ADR[15:0]
DATA[7:0]
TA
32 bit µController
sync
EtherCAT device
DATA[23:16] DATA[15:8]
SIZ[1] open
SIZ[0] BHE
R/W RD/WR
OE open
IRQ IRQ
A[23:16] open
BS[3:0] open
D[15:0] open
General purpose input EEPROM_Loaded
optional
Figure 31: Synchronous 32 bit µController connection using Transfer Size