0700461908708 datasheet(9/25 Pages) PYCOM

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11.0 Memory Map

11.1

Flash

11.2

RAM

11.3

ROM and eFuses

Table 5 – Flash memory map

Table 6 – RAM memory map

Table 7 – Miscellaneous memory

Name

Description

Start address

Size

NVS

Non–volatile RAM area. Used by the NVS API

0x9000

0x7000

Firmware Slot 0

First firmware slot. Factory firmware is flashed here

0x10000

0x180000

OTA info

Information about the current active firmware

0x190000

0x1000

Firmware Slot 1

Second firmware slot

0x1A0000

0x180000

File system (1)

504KB file system on devices with 4MB flash

0x380000

0x7F000

Config

Config area for LoRa, Sigfox and LTE

0x3FF000

0x1000

File system (2)

4MB file system on devices with 8MB flash

0x400000

Name

Description

Size

On–chip SRAM

Internal RAM memory used by the 2 xtensa CPUs

520KB

Fast RTC RAM

Fast RAM area accessible by the xtensa cores during

boot and sleep modes

8KB

Slow RTC RAM

Slow RAM area accessible by the Ultra–Low Power

Coprocessor during deep sleep

8KB

External pSRAM

External QSPI RAM memory clocked @ 40MHz

4MB

Name

Description

Size

On–chip ROM

Contains core functions and boot code.

448KB

eFuse

256 bits are used for the system (MAC address and

chip configuration) and the remaining 768 bits are

reserved for customer applications, including Flash–

Encryption and Chip–ID

1kbit

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