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ADVANCED COMMUNICATIONS & SENSING
9
USB Interface
9.1
Gateway to SX8724S
The USB gateway is a complete interface to drive the SX8724S on the board. The knowledge, implementation
or modification of this gateway is not required for evaluation.
This interface is used to communicate with the GUI, but can also enable automation with external processes
such as Python, MATLAB, and LabVIEW.
R4
1K
BOOT LOADER
J9
GND
ACS - Revision 1.0
© Semtech Corp.
U2
19
PGD/D+
18
PGC/D-
4
MCLR/VPP
3
OSC2
2
OSC1
12 MHz
13
HC49
RB4
12
Y1
RB5
11
RB6
2
1
10
RB7
C9
C10
20
GND
22pF
22pF
PIC18F14K50-E/SS
GND
Figure 9. PIC Gateway Schematic
Figure 10. PIC Gateway on the Board
May 2011
Evaluation Kit for SX8724S Data Acquisition System
RA0/I OCA0/D+/P GD
RA1/I OCA1/D- /PGC
RA3/I OCA3/MCL R/VP P
RA4/AN3/I OCA3/OSC2/CL K OUT
RA5/I OCA5/OSC1/CL K IN
RB4/AN10/I OCB4/SDI /SDA
RC0/AN4/C12I N+/INT0/Vref+
RB5/AN11/I OCB5/RX/DT
RC1/AN5/C12I N1-/INT1/Vref-
RB6/I OCB6/SCK /SCL
RC2/AN6/P 1D/C12I N2-/CVref/I NT2
RB7/I OCB7/TX/CK
RC3/AN7/P 1C/C12I N3-/PGM
RC6/AN8/SS/T13CK I/T1OSCI
VSS
USB interface
PICKit programmer/debugger interface
Page 14
SX8724SEVK
17
VUSB
VUSB
1
VDD
VBOARD
16
RC0
15
RC1
14
RC2
7
RC3
6
RC4
RC4/P 1B/C12OUT/SRQ
5
RC5
RC5/CCP 1/P1A/T0CK I
8
RC6
9
RC7
RC7/AN9/SDO/T1OSCO
Pin access to the PIC gateway
USER GUIDE
VUSB
VBOARD
C11
C12
0.47uF
0.1uF
GND
GND
Bootloader mode control
PIC gateway
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