User's Manual

1 Overview
1.2 Pin Description
Keepout Zone
IO0
1
IO1
2
EN
3
IO2 4
IO4
5
IO5
6
IO6 7
TXD016
3V3 8
RXD015
IO314
IO10
13
IO912
IO8
11
IO7
10
GND
9
17
GND
GND GND GND
GND GND
GNDGND GND
Figure 1: Pin Layout (Top View)
The module has 17 pins. See pin definitions in Table 2.
Table 2: Pin Definitions
Name No. Type
1
Function
IO0 1 I/O/T GPIO0�ADC1_CH0, XTAL_32K_P
IO1 2 I/O/T GPIO1, ADC1_CH1, XTAL_32K_N
EN 3 I
High: on, enables the chip.
Low: off, the chip powers off.
Default: internally pulled-up
IO2 4 I/O/T GPIO2, ADC1_CH2, FSPIQ
IO4 5 I/O/T GPIO4, ADC1_CH4, FSPIHD, MTMS, LED PWM
IO5 6 I/O/T GPIO5, ADC2_CH0, FSPIWP, MTDI, LED PWM
IO6 7 I/O/T GPIO6, FSPICLK, MTCK, LED PWM
3V3 8 P Power supply
Cont’d on next page
Espressif Systems 5 ESP8685-WROOM-04 User Manual v0.1