EVB-EMC1033 SMSC, EVB-EMC1033 Datasheet - Page 6

• Manufacturer Part Number: EVB-EMC1033
• Description: MCU, MPU & DSP Development Tools Evaluation Board
• Manufacturer: SMSC

Specifications of EVB-EMC1033

• Processor To Be Evaluated: EMC1033
• Interface Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 1.1 (08-21-07)
3.8
3.9
3.10
Direct SMBus Connect Option
Test Points
LED Indicators
It is also possible to connect an external SMBus master to the EMC1002 EVB. A few modifications to
the circuit are required:
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Test points are provided for:
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LEDs indicate the status of the following signals:
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Cut 3 traces connecting JP4 pins 3-4, 5-6 and 7-8 on the bottom side of the PCB. This will
disconnect the USB bridge from the SMBus. The pullup resistors for the SMBus SDA, SCL and
Alert/Therm2
SMBus Master.
Install P1 or JP4 to provide an SMBus connector. See the Jumper Settings and Connection List
for details.
Optionally remove zero ohm resistor R31. When removed, the USB to SMBus bridge will not supply
+3.3V to the circuitry so power will need to be provided from an external source. If R31 is left
installed, power will be supplied from the USB connector when connected to a computer or USB
hub.
Alert/Therm2
Addr
Ground
+3.3V power
+5V_USB power
Alert/Therm2
Addr
+3.3V
USB Activity - blinking indicates USB traffic
Bridge Activity, when ON indicates the Bridge is functioning
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Therm
Therm
, EMC1002/1033/1402 pin 4
output, EMC1002/1033/1402 pin 4
, EMC1002/1033/1402 pin 6
signals are also disconnected so external pullups will need to be supplied by the
output, EMC1002/1033/1402 pin 6
6
EMC1002/EMC1033/EMC1402 EVB User Manual
SMSC EMC1002/EMC1033/EMC1402