Product Specs

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4.6 Pin Definition
Figure 3. Pin Definition
Table 4. Pin Function Definition
NO
Name
IO Type
Description
1
CHIP_EN
I/O
Chip enable pin (active high)
2
GPIO12
I/O
GPIO12
3
GPIO14
I/O
GPIO14
4
GPIO11
I/O
GPIO11
5
GPIO5
I/O
GPIO5
6
GPIO2
I/O
GPIO2
7
GPIO1
I/O
GPIO1
8
VCC
P
Power supply. 3.3V is required
9
GND
P
Ground connections
10
GPIO0
I/O
GPIO0
11
GPIO8
I/O
GPIO8 (Boot option).
12
GPIO17
I/O
GPIO17
13
GPIO3
I/O
GPIO3
14
GPIO4
I/O
GPIO4
15
RXD
I
UART RX
16
TXD
O
UART TX
Note1: P means power pin, I/O means input/output pin, AI means analog input pin.
Note2: The pin state of GPIO8 is sampled on the rising edge of CHIP_EN. When GPIO8 is pulled to VCC, chip will
boot from UART. Otherwise chip will boot from flash.
5. Dimension & Footprint
Module dimension: Typical (W x L x H): 24mm×16mm×1.0mm Tolerance : +/-0.15mm
P14
CHIP_EN
P11
GPIO11
P7
GPIO0
P15
P3
P12
GPIO4
P6
VDD33
GPIO8
P16
P2
P13
GPIO7
P5
GPIO1
GPIO17
P1
GPIO14
P9
GPIO16
P4
GPIO2
GPIO3
GPIO12
P10
GPIO5
P8
GND