
Overview
1.2 Block Circuit Diagram
Figure 2:
Block circuit diagram
1.3 Hardware Components
• CPU core with Texas Instruments Sitara
TM
ARM Cortex-A8 CPU
• 64MByte serial NOR Flash for storing the bootloader and the operating system
• 128MByte DDR3L RAM
• 3 switchable RS-232/RS-422/RS-485 interfaces connected via a 4 x USB UART
• 16 port Ethernet switch designed of two Marvell 88E6390 11 port switches
• 24V power supply voltage
• microSD card slot for commissioning purposes and as potential alternative boot media of the
operating system
• Optional 24V/1A power supply voltage via the COM-A interface for powering external devices.
The 24V output is protected by a fuse (I
OUT
=1 A) and can be configured via a jumper,
see page 17)
• Two reset buttons (Customer Default, Factory Reset) for configuration
Switch16/Com3
Hardware Manual • Doc. No.: A.1109.21 / K.0508.75 / Rev. 1.1
Page 9 of 31
16x
10/100/1000
RJ45
RS-232
RS-422
RS-485
DE-9
RS-232/RS-422/RS-485
8-wire
DE-9
RS-232/RS-422/RS-485
8-wire
RS-232
RS-422
RS-485
DE-9
RS-232/RS-422/RS-485
8-wire
RS-232
RS-422
RS-485
USB
Quad UART
Bridge
Console
Header 1x6 intern, TTL
2-wire
MII
USB
UART
MMC
AM3352
DDR3L
RAM
SPI
Flash
Fast Ethernet
Switch
GPIO
MircoSD-Card
internal
24V In
24V
5V
3,3V
1,8V
1,5V
1,1V
1A
Fast Ethernet
Switch
MII
GPIO
GPIO
GPIO
Customer
Default
Electronic
Fuse
3 Pin
Jumper
Factory
Reset