"

2. Pin Description

2.

Pin Description

Figure 2-1 shows the pin layout of ESP-PSRAM64 and ESP-PSRAM64H.

"

Figure 2-1. Pin Layout of ESP-PSRAM64 and ESP-PSRAM64H

Table 2-1. Signals Table

Pin

Signal

Type

SPI Mode Function

QPI Mode Function

Power

Core supply, 1.8V for ESP-PSRAM64, 3.3V for ESP-PSRAM64H.

Vss

Ground

Core supply ground

CE#

Input

Chip select signal, active low. When CE#=1, the chip is in standby state.

CLK

Input

Clock signal

SI/SIO[0]

I/O

Serial input

I/O[0]

SO/SIO[1] I/O

Serial output

I/O[1]

SIO[2]

I/O

-

I/O[2]

SIO[3]

I/O

-

I/O[3]

Espressif Systems

" /"

2018.06

2 22