BECKHOFF ET1100 - Manual (Page 34)

Pin Description
III-20 Slave Controller – ET1100 Hardware Description
3.2.10 SII EEPROM Size
EEPROM_SIZE determines the size of the EEPROM (and the number of I²C address bytes).
EEPROM_SIZE is sampled at the beginning of the EEPROM access. EEPROM_SIZE is shown in
Table 24:
Table 24: SII EEPROM_SIZE
Description Config signal Pin name Register Values
E²PROM Size EEPROM_SIZE RUN/EEPROM_SIZE 0x0502[7]
0 = 1 address byte (1 Kbit to 16 Kbit EEPROM)
1 = 2 address bytes (32 Kbit to 4 Mbit EEPROM)
3.2.11 Reserved
The reserved configuration pin should be pulled down when 4 ports are used. Otherwise it should be
left open. It is shown in Table 25:
Table 25: Reserved
Description Config signal Pin name Register Values
Reserved RESERVED
PDI[28]/PERR(3)/TRANS(3
)
0x0E01[7] 0 for 4 port configurations