ESP32-P4 datasheet(44/93 Pages) ESPRESSIF

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4 Functional Description

• In-package PSRAM

– The size of PSRAM is detailed in Section 1 ESP32-P4 Series Comparison

– Maximum clock frequency: 250 MHz

– Supports up to 64 MB storage

– Supports hardware XTS-AES encryption/decryption, protecting programs and data stored in PSRAM

– Through a cache, it can map 64 KB blocks into a 64 MB instruction or data space, supporting 8-bit,

16-bit, 32-bit, and 128-bit read and write operations

The maximum theoretical bandwidth of PSRAM should be calculated using the following formula:

Max theoretical bandwidth (PSRAM) = line_num

× edge_mode × PSRAM_max_freq

Where:

• line_num is the number of PSRAM data lines.

• edge_mode is the PSRAM sampling mode: 1 for single-edge sampling, and 2 for double-edge sampling.

• PSRAM_max_freq is the maximum operating clock frequency of the PSRAM.

For example, based on the PSRAM parameters in the current package, the theoretical maximum bandwidth is:

16 × 2 × 250 MHz = 8 Gbit/s.

External Memory

ESP32-P4 allows connection to memories outside the chip’s package via the SPI, Dual SPI, Quad SPI, and QPI

interfaces. The maximum clock frequency is 120 MHz.

The external flash can be mapped into the CPU instruction memory space and read-only data memory space.

ESP32-P4 supports up to 64 MB of external flash, and hardware encryption/decryption based on XTS-AES to

protect users’ programs and data in flash.

Through high-speed caches, ESP32-P4 can support at a time up to:

• External flash mapped into 64 MB instruction space as individual blocks of 64 KB

• External flash can also be mapped into 64 MB data space as individual blocks of 64 KB, supporting 8-bit,

16-bit, 32-bit, and 128-bit reads.

Note:

After ESP32-P4 is initialized, firmware can customize the mapping of external flash into the CPU address space.

4.1.3.2 eFuse Controller

ESP32-P4 contains a 4096-bit eFuse memory to store parameters and user data. The parameters include

control parameters for some hardware modules, system data parameters and keys used for the

encryption/decryption module. Once an eFuse bit is programmed to 1, it can never be reverted to 0.

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ESP32-P4 Series Datasheet v0.5

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