1 overview, Overview, Table 1: et1100 main features – BECKHOFF ET1100 User Manual
Page 15: Figure 1: et1100 block diagram
Overview
Slave Controller
– ET1100 Hardware Description
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1
Overview
The ET1100 ASIC is an EtherCAT Slave Controller (ESC). It takes care of the EtherCAT
communication as an interface between the EtherCAT fieldbus and the slave application. The ET1100
supports a wide range of applications. For example, it may be used as a 32 bit Digital I/O node without
external logic using Distributed clocks, or as a part of a complex µController design with up to 4
EtherCAT communication ports.
Table 1: ET1100 Main Features
Feature
ET1100
Ports
2-4 ports (each EBUS or MII)
FMMUs
8
SyncManagers
8
RAM
8 Kbyte
Distributed Clocks
Yes, 64 bit (power saving options with SII EEPROM configuration)
Process Data Interfaces
32 Bit Digital I/O (unidirectional/bidirectional)
SPI Slave
8/16 asynchronous/synchronous µController
Power supply
Integrated voltage regulator (LDO) for logic core/PLL (5V/3.3V to
2.5V), optional external power supply for logic core/PLL.
I/O
3.3V compatible I/O
Package
BGA128 (10x10 mm
2
)
Other features
Internal 1GHz PLL
Clock output for external devices (10, 20, 25 MHz)
The general functionality of the ET1100 EtherCAT Slave Controller (ESC) is shown in Figure 1:
ECAT
Processing
Unit
AutoForwarder +
Loopback
SyncManager
FMMU
ESC address space
User RAM
Registers
Process RAM
EEPROM
Distributed
Clocks
Monitoring
Status
Reset
PHY
Management
Reset
SYNC
LEDs
I²C EEPROM
PHY MI
SPI / µC / Digital I/O
0
1
2
3
EBUS/MII ports
LATCH
PDI
ECAT Interface
PDI Interface
Figure 1: ET1100 Block Diagram