BECKHOFF EtherCAT Registers Section II - Manual (Page 60)

SII EEPROM Interface (0x0500:0x050F)
II-48 Slave Controller – Register Description
NOTE: r/(w): write access depends upon the assignment of the EEPROM interface (ECAT/PDI). Write access is
generally blocked if EEPROM interface is busy (0x0502.15=1).
NOTE: r/[w]: EEPROM emulation only: write access is possible if EEPROM interface is busy (0x0502.15=1). PDI
acknowledges pending commands by writing a 1 into the corresponding command register bits (0x0502[10:8]).
Errors can be indicated by writing a 1 into the error bit 0x0502.13. Acknowledging clears AL Event Request
0x0220[5].
*
1
ESC20: configurable with pin EEPROM SIZE, but not readable in this register.
*
2
Write Enable bit 0 is self-clearing at the SOF of the next frame, Command bits [10:8] are self-clearing after the
command is executed (EEPROM Busy ends). Writing “000” to the command register will also clear the error bits
[14:13]. Command bits [10:8] are ignored if Error Acknowledge/Command is pending (bit 13).
*
3 Error bits are cleared by writing “000” (or any valid command) to Command Register Bits [10:8].
Table 67: Register EEPROM Address (0x0504:0x0507)
ESC20 ET1100 ET1200 IP Core
Bit Description ECAT PDI Reset Value
31:0 EEPROM Address
0:
First word (= 16 bit)
1: Second word
…
Actually used EEPROM Address bits:
[9:0]:
EEPROM size up to 16 kBit
[17:0]: EEPROM size 32 kBit – 4 Mbit
[32:0]: EEPROM Emulation
r/(w) r/(w) 0
NOTE: r/(w): write access depends upon the assignment of the EEPROM interface (ECAT/PDI). Write access is
generally blocked if EEPROM interface is busy (0x0502.15=1).
Table 68: Register EEPROM Data (0x0508:0x050F [0x0508:0x050B])
ESC20 ET1100 ET1200 IP Core
[63:32] [63:32]
Bit Description ECAT PDI Reset Value
15:0 EEPROM Write data (data to be written to
EEPROM) or
EEPROM Read data (data read from
EEPROM,. lower bytes) r/(w) r/(w)
r/[w] 0
63:16 EEPROM Read data (data read from
EEPROM, higher bytes) r/- r/-
r/[w]
NOTE: r/(w): write access depends upon the assignment of the EEPROM interface (ECAT/PDI). Write access is
generally blocked if EEPROM interface is busy (0x0502.15=1).
NOTE: r/[w]: write access for EEPROM emulation if read or reload command is pending. See the following
information for further details: