|
Pin No.
|
Pin definition
|
I/O
|
Voltage
|
Description
|
|
1
|
NC
|
|
|
|
|
2,17,19,36
|
GND
|
-
|
0-3.3V
|
Connect to the power supply ground
|
|
3
|
RESET
|
I
|
0-3.3V
|
Module reset pin, normal high level,
pull low to reset
|
|
4
|
Reserved
|
|
|
Leave open
|
|
5
|
Reserved
|
|
|
Leave Open
|
|
6
|
TEST
|
I
|
0-3.3V
|
Reserve
|
|
7
|
DEFAULT
|
I
|
0-3.3V
|
In the working state, continuous pulling down for
about 10 seconds with internal pull-up forces
a restart and restores factory settings
|
|
8
|
P200
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
9
|
P112
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
10
|
P111
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
11
|
P301
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
12
|
P302
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
13
|
CS
|
I
|
0-3.3V
|
Sleep pin, internally pulled up, enters sleep
mode when externally driven low
|
|
14
|
P400
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
15
|
RXD
|
I
|
0-3.3V
|
Serial data input pin, connected to the TXD pin of
an external device
|
|
16
|
TXD
|
O
|
0-3.3V
|
Serial data input pin, connected to the RXD pin of
an external device
|
|
18
|
VCC
|
-
|
3.0-5.5V
|
External power supply positive pole
|
|
20
|
P500
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
21
|
TXOK
|
O
|
0-3.3V
|
In data transmission mode only, defaults to low level.
Outputs high level after data transmission completion
|
|
22
|
RXOK
|
O
|
0-3.3V
|
In data transmission mode only, defaults to low level.
The module outputs high level continuously during the
period from receiving data to completing serial output
|
|
23
|
P011
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
24
|
P010
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
25
|
P002
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
26
|
P001
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
27
|
P000
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
28
|
P012
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
29
|
P409
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
30
|
P913
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
31
|
P407
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
32
|
P408
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
33
|
P915
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
34
|
P914
|
I/O
|
0-3.3V
|
Internal MCU IO, expandable applications
|
|
35
|
UPGRADE
|
I
|
0-3.3V
|
Internal pull-up. Module resets and enters
serial upgrade mode upon receiving a
low-level input externally
|
