USB375x EVB - Evaluation Board User Manual
SMSC USB375x EVB
3
Revision 1.1 (08-29-11)
USER MANUAL
The SCL, SDA and INT_B pins are also exposed on the
J6
header. These pins are compatible with
the Aardvark pinout, where pin 1 of the Aardvark connector connects to pin 1 of the header or SCL.
2.3
Vcc I
2
C Regulator
The USB375x EVB contains circuitry to pull up the I
2
C pins to a specified Vcc voltage. The Vcc voltage
can be adjusted by choosing the proper
R21
resistance.
R10, R11
and
R12
are used to pull the I
2
C
pins up to Vcc. The current value of the I
2
C pullups are10k , but a smaller value may need to be
selected for 1MHz operation. The current Aardvark speed is at a very slow clock speed.
Figure 2.2 Test points, LED and Header
Figure 2.3 Vcc Regulator and I
2
C Pull-up Resistors
TP1
TP2
TP3, LED4
J6
Ω
RPU
Vcc