Espressif ESP01 Quick Start Manual page 13

4 . PERIPHERALS AND SENSORS
Interface
Parallel QSPI
General Purpose
SPI
JTAG
Signal
SPIHD
SPIWP
SPICS0
SPICLK
SPIQ
SPID
HSPICLK
HSPICS0
HSPIQ
HSPID
HSPIHD
HSPIWP
VSPICLK
VSPICS0
VSPIQ
VSPID
VSPIHD
VSPIWP
HSPIQ_in/_out
HSPID_in/_out
HSPICLK_in/_out
HSPI_CS0_in/_out
HSPI_CS1_out
HSPI_CS2_out
VSPIQ_in/_out
VSPID_in/_out
VSPICLK_in/_out
VSPI_CS0_in/_out
VSPI_CS1_out
VSPI_CS2_out
MTDI
MTCK
MTMS
MTDO
Pin Function
SHD/SD2
SWP/SD3
SCS/CMD
SCK/CLK
SDO/SD0
SDI/SD1
IO14
IO15
Supports Standard SPI, Dual SPI, and
IO12
Quad SPI that can be connected to the
IO13
external flash and SRAM
IO4
IO2
IO18
IO5
IO19
IO23
IO21
IO22
Standard SPI consists of clock,
chip-select, MOSI and MISO. These SPIs
can be connected to LCD and other
external devices. They support the
following features:
• both master and slave modes;
Any GPIOs*
• 4 sub-modes of the SPI format
transfer that depend on the clock
phase (CPHA) and clock polarity
(CPOL) control;
• configurable SPI frequency;
• up to 64 bytes of FIFO and DMA.
IO12
IO13
JTAG for software debugging
IO14
IO15
12 ESP01 Datasheet V1.0