rtd cpuModules CME34BT, User Manual, Page: 21 / 110

BDM-610000088 Rev A Chapter 1: Introduction 13
Electrical Characteristics
The table below lists the Electrical Characteristics of the CME34BT. Operating outside of these parameters
may cause permanent damage to the cpuModule.
Table 4 Electrical Characteristics
Symbo
l
Parameter Test
Condition
Min. Max.
USB Ports
Ioc Overcurrent Limit Each port 0.5 A 5.0 A
SVGA Port
V
OH
Output Voltage
High
HSYNC, VSYNC
I
OH
= –8.0 mA 2.4 V 3.3 V
V
OL
Output Voltage Low
HSYNC, VSYNC
I
OL
= 8.0 mA 0.0 V 0.5 V
V
OH
Output Voltage
High
DDC_*
I
OH
= –4.0 mA 2.4 V 3.3 V
V
OL
Output Voltage Low
DDC_*
I
OL
= 8.0 mA 0.0 V 0.4 V
V
IH
Input Voltage High
DDC_*
— 2.0 V 5.5 V
V
IL
Input Voltage Low
DDC_*
— -0.3 V 0.8 V
I
DDCvcc
Supply Current for
DDC Electronics
— 500 mA
DisplayPort
I
VCC
Supply Current — 500 mA
Serial Ports - RS-232
V
OH
Output Voltage
High
R
L
= 3 k 5.0 V 7.0 V
V
OL
Output Voltage Low R
L
= 3 k -7.0 V -5.0 V
V
IH
Input Voltage High — 2.0 V 15 V
V
IL
Input Voltage Low — -15 V 0.6 V
Serial Ports - RS-422/485
V
OD1
Differential Output R
L
= 100 Ohm 2.0 V
V
OD2
Differential Output R
L
= 54 Ohm 1.5 V
V
OC
Common Mode
Output
R
L
= 54 or 100
Ohm
3.0 V
V
TH
Differential Input
Threshold
-200 mV -50 mV
V
I
Absolute Max Input
Voltage
-18 V 18 V