Ebyte E840-TTL-NB03 User Manual page 6

Chengdu Ebyte Electronic Technology Co., Ltd.
9 VEF
10、11、14、 MOD、SLE、
15、23 PA6、PA7、EN
12 4V2
16 VCC
19 VD
20 RS
21 DA
22 CL
13、17、18 GND
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Drive level power supply pin, if you need to achieve 5V serial communication and LED
indication is 5V drive level, you need to input 5V level on this pin.
Lithium battery power supply pin, power supply range: 2.5V~3.6V. This pin is prohibited from
being reversed and is not allowed to be supplied with VCC.
DC power supply pin, power supply range: 5V~20V. This pin is prohibited from being reversed
and is not allowed to be supplied with 4V2.
Connect to external SIM card power supply pin, if the onboard SIM card holder is used, the pin
Connect to external SIM reset pin, if the onboard SIM card holder is used, the pin NC can be
Connect to external SIM data pin, if the onboard SIM card holder is used, the pin NC can be
Connect to external SIM clock pin, if the onboard SIM card holder is used, the pin NC can be
Unavailable
NC can be used.
used.
used.
used.
Ground
E840-TTL-NB03 User Manual
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