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GC868-DUAL EVK2 User Guide
1vv0300803 Rev.1- May 2009
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 18
of 55
7 Serial interface
The following figure shows the architecture of the serial ports.
8
8
SO301
Upper
U303
8
+5V USB
6MHz
USB (1)
USB (2) spare
U502
2
H
U
B
USB-B
SO501
XTAL2
2
U504
3V LDO
U505
USB(0)
SO301
Lower
A
S
C
1
A
S
C
0
2
2
+3,7V
LDO
on/off
3V LDO
U506
Port B (1)
PWR Ena
U509
VCCIO
3
Port A (1)
2
VCCIO
PWR Ena
2
Port A (0)
GPS debug
R0
3
SERIAL9.SKD
RESERVED
R0
2
SO301
U503
8
Port B (0)
U304
2
NMEA (GM862-GPS)
2
AT commands
PROGRAM
Figure 9: Serial ports block diagram.