BECKHOFF EtherCAT Technology Section I - Manual (Page 101)

SII EEPROM
Slave Controller – Technology I-81
R/W 1 0 0 1
EEPROM_CLK
A18 EEPROM_DATA
t
Clk
A16 A17 Ack A15 A13 A14 A12 A10 A11 A9 Ack A8
Start Control Byte High Address Byte
A3 A1 A2 Ack D7 D5 D6 D4 D2 D3 D1 Ack D0
Low Address Byte Data Byte 0
A7 A5 A6 A4
EEPROM_CLK
EEPROM_DATA
D11 D9 D10 Ack
Data Byte 1
D8 D15 D13 D14 D12
EEPROM_CLK
EEPROM_DATA
Stop
A0
t Write
t
Write
Figure 39: Write access (2 address bytes, 32 Kbit - 4 Mbit EEPROMs)
R/W 1
R/W 1 0 0 1
EEPROM_CLK
A10 EEPROM_DATA
t
Clk
A8 A9 Ack A7 A5 A6 A4 A2 A3 A1 Ack A0
Start Control Byte Low Address Byte
D7 D5 D6 D4 D2 D3 D1 Ack D0
Control Byte Data Byte 0
EEPROM_CLK
EEPROM_DATA
D11 D9 D10
Data Byte 1
D8 D15 D13 D14 D12
EEPROM_CLK
EEPROM_DATA
Start
1 0 0 A10 A8 A9 Ack
Optional: High
Address Byte
No
Ack
DN.3 DN.1 DN.2
Data Byte N
DN.0 DN.7 DN.5 DN.6 DN.4
Stop
Ack
t Read
t Read
Figure 40: Read access (1 address byte, up to 16 Kbit EEPROMs)