Quectel BC66 - USIM Interface

NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 32 / 59
1. Transistor circuit solution is not suitable for applications with high baud rates exceeding 460Kbps.
2. “ ” represents the test point of UART interfaces. It is also recommended to reserve the test points of
VBAT and PWRKEY, for convenient firmware upgrade and debugging when necessary.
3. “*” means under development.
3.10. USIM Interface
The module provides a USIM interface compliant to ISO/IEC 7816-3, enabling the module to access to an
external 1.8V USIM card.
The external USIM card is powered by an internal regulator in the module and supports 1.8V power
supply.
Table 13: Pin Definition of USIM Interface
A reference circuit design for USIM interface with a 6-pin USIM card connector is illustrated below.
Pin Name
Pin No.
Description
Comment
SIM_VDD
14
Power supply for USIM card
Voltage accuracy: 1.8V±5%.
Maximum supply current: about 60mA.
SIM_CLK
13
Clock signal of USIM card
SIM_DATA
11
Data signal of USIM card
SIM_RST
12
Reset signal of USIM card
SIM_GND
10
Specified ground for USIM card
NOTES