Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 22)

Si2493/57/34/15/04
Global ISOmodem-EVB
22 Rev. 0.6
Figure 19. USB Interface Schematic
TXD_U
RTS_R
DTR_U
USB-
USB+
RXD_U
CTS_U
DSR_U
CD_U
RI_U
USB_VCC
U11
GMS05F
5
4
1
2
3
TP19
+ C29
1.0 uF
C31
R20
4.7 k U5
CP2101/02
REGIN
7
VDD
6
GND
3
VBUS
8
D-
5
D+
4
CTS
23
RTS
24
RXD
25
TXD
26
DSR 27
DTR
28
DCD
1
RI
2
SUSPEND
11
SUSPEND
12
RST 9