3 pdi signal overview, Pdi signal overview, Table 10: pdi signal overview – BECKHOFF ET1100 User Manual
Page 27
Pin Description
Slave Controller
– ET1100 Hardware Description
III-13
3.1.3
PDI Signal Overview
Table 10: PDI signal overview
PDI
Signal
Dir.
Description
Digital I/O
EEPROM_LOADED
O
PDI is active, EEPROM is loaded
I/O[31:0]
I/O/BD
Input/Output or Bidirectional data
LATCH_IN
I
External data latch signal
OE_CONF
I
Output Enable Configuration
OE_EXT
I
Output Enable
OUTVALID
O
Output data is valid/Output event
SOF
O
Start of Frame
WD_TRIG
O
Watchdog Trigger
SPI
EEPROM_LOADED
O
PDI is active, EEPROM is loaded
SPI_CLK
I
SPI clock
SPI_DI
I
SPI data MOSI
SPI_DO
O
SPI data MISO
SPI_IRQ
O
SPI interrupt
SPI_SEL
I
SPI chip select
µC async.
CS
I
Chip select
BHE
I
Byte High Enable (16 bit µController interface only)
RD
I
Read command
WR
I
Write command
BUSY
O
EtherCAT device is busy
IRQ
O
Interrupt
EEPROM_LOADED
O
PDI is active, EEPROM is loaded
DATA[7:0]
BD
Data bus for 8 bit µController interface
ADR[15:0]
I
Address bus
DATA[15:0]
BD
Data bus for 16 bit µController interface
µC sync.
ADR[15:0]
I
Address bus
BHE
I
Byte High Enable
CPU_CLK_IN
I
µController interface clock
CS
I
Chip select
DATA[15:0]
BD
Data bus for 16 Bit µController interface
DATA[7:0]
BD
Data bus for 8 Bit µController interface
EEPROM_LOADED
O
PDI is active, EEPROM is loaded
IRQ
O
Interrupt
RD/nWR
I
Read/Write access
TA
O
Transfer Acknowledge
TS
I
Transfer Start