Billion Electric Co. Ltd. BIL-SIM7100C Benutzerhandbuch
Smart Machine Smart Decision
SIM7100C_User Manual_V1.01
2015-09-19
51
Figure 30: Flight mode switch
Table 34: Flight mode status
GPIO4 Status
Module operation
Low Level
Flight Mode: RF is closed.
High Level
Normal Mode: RF is working.
Note
：
1. For SIM7100C, GPIO0, GPIO2, GPIO3 and GPIO5 have multiplex function, user can use
them as PCM interface to connect extend codec. Refer to section 3.11 and document [1] for details.
2. When the module is powered off, make sure all digital interfaces (PCM UART, etc) connected with
peripheral devices have no voltage higher than 0.3V. If users’ design cannot meet above conditions,
high level voltages maybe occur in GPIO pins because current leakage from above digital interfaces
may occur.
2. When the module is powered off, make sure all digital interfaces (PCM UART, etc) connected with
peripheral devices have no voltage higher than 0.3V. If users’ design cannot meet above conditions,
high level voltages maybe occur in GPIO pins because current leakage from above digital interfaces
may occur.
3.14 Multi-functional interface
SIM7100C merges functions for various applications. It can enrich users’ design and lower the cost of
users’ hardware.
users’ hardware.
3.14.1 Sink Current Source
The dedicated pin (ISINK) is intended for driving passive devices ， such as LCD backlight, this
implementation is VBAT tolerant and suitable for driving white LEDs. The high-current driver can
maintain a constant current which is set by the AT command “AT+ CLEDITST”, capable of up to 40 mA.
implementation is VBAT tolerant and suitable for driving white LEDs. The high-current driver can
maintain a constant current which is set by the AT command “AT+ CLEDITST”, capable of up to 40 mA.
Table 35: Sink Current Electronic characteristic