Data Sheet

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1

2

3

4

5

6

7

8

9

2 MODULE INTERFACES

Pin number Symbol I/O type Function

Test point CSN I/O Mode selection

pin. If connected

to the ground

before powered

on, enter the

ﬁrmware test

mode. If not

connected or

connected to VCC

before powered

on, enter the

ﬁrmware

application mode

Correspond to

P21 on the

internal IC

Note: P indicates a power supply pin and I/O indicates an input/output pin.

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