Smart Module Series
SC200R&SC262R_Series_Hardware_Design 51 / 124
The following figure is an example of connection between the module and PC. It is recommended to add
a level translator and an RS-232 level translator chip between the module and PC. The following figure
shows the reference design.
RTS_3.3V
RXD_3.3V
CTS_3.3V
TXD_3.3V
RTS_1.8V
RXD_1.8V
CTS_1.8V
TXD_1.8V
VCCA
Module
GND GND
1.8 V
VCCB
3.3 V
DIN1
ROUT3
ROUT2
ROUT1
DIN4
DIN3
DIN2
DIN5
R1OUTB
FORCEON
/FORCEOFF
/INVALID
3.3 V
DOUT1
DOUT2
DOUT3
DOUT4
DOUT5
RIN3
RIN2
RIN1
VCC GND
OE
DB-9
RTS
TXD
CTS
RXD
GND
UART5_RXD
UART5_TXD
UART5_RTS
UART5_RXD
UART5_CTS
Figure 14: RS-232 Level Match Circuit (for UART5)
UART2 and UART1 are similar to UART5. For the reference design, refer to that of UART5.
3.11. (U)SIM Interfaces
SC200R series module provides two (U)SIM interfaces that meet ETSI and IMT-2000 requirements. Dual
SIM Dual Standby is supported by default. Either 1.8 V or 2.95 V (U)SIM card is supported, and the
(U)SIM card is powered by the internal power supply of the module.
Table 15: Pin Definition of (U)SIM Interfaces
(U)SIM2 card hot-plug detect
Active low.
Externally pull it up to 1.8 V.
If it is not used, keep it open.
This function is disabled by
default via software.
Cannot be multiplexed into a
generic GPIO.
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