UMTS/HSPA Module Series
UG96 Hardware Design
UG96_Hardware_Design 39 / 76
TXS0108EPWR
DCD_3.3V
RTS_3.3V
DTR_3.3V
RXD_3.3V
RI_3.3V
CTS_3.3V
TXD_3.3V
DCD
RTS
DTR
RXD
RI
CTS
TXD
DCD_1.8V
RTS_1.8V
DTR_1.8V
RXD_1.8V
RI_1.8V
CTS_1.8V
TXD_1.8V
VCCA
Module
GND
GND
VDD_EXT
VCCB
3.3V
DIN1
ROUT3
ROUT2
ROUT1
DIN4
DIN3
DIN2
DIN5
R1OUTB
FORCEON
/FORCEOFF
/INVALID
3.3V
DOUT1
DOUT2
DOUT3
DOUT4
DOUT5
RIN3
RIN2
RIN1
VCC
GND
OE
Translator
DB9M
PC side
DCD
RTS
DTR
TXD
RI
CTS
RXD
DSR
GND
1
2
3
4
5
6
7
8
9
Figure 22: RS232 Level Match Circuit
1. The module disables the hardware flow control by default. When hardware flow control is required,
RTS and CTS should be connected to the host. Command
AT+IFC=2,2
is used to enable hardware
flow control and
AT+IFC=0,0
is used to disable the hardware flow control. For more details, please
refer to
document [1]
.
2. Rising edge on DTR will let the module exit from the data mode by default, and it can be disabled by
AT commands. Please refer to
document [1]
for details.
3. DCD is used as data mode indication. Please refer to
document [1]
for details.
4. It is suggested that USB_DP, USB_DM and USB_VBUS pins should be set as test points and then be
placed on DTE for debugging.
3.11. (U)SIM Interface
The (U)SIM interface circuitry meets ETSI and IMT-2000 requirements. Both 1.8V and 3.0V (U)SIM cards
are supported.
Table 12: Pin Definition of (U)SIM Interface
Pin Name
Pin No. I/O
Description
Comment
USIM_PRESENCE
42
DI
(U)SIM card insertion detection 1.8V power domain.
USIM_VDD
43
PO
Power supply for (U)SIM card
Either 1.8V or 3.0V is
supported by the module
NOTES