US 2025/0165178 A1Published application

Microcontroller chip

AssigneeGigadevice Semiconductor Inc.

InventorsYang GAO, Yingwu ZHANG

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Abstract

The present invention provides an MCU chip composed of an MCU die and two or more flash memory dies stacked and packaged with the MCU die. In order to update firmware by means of an OTA upgrade, an OTA upgrade version of the firmware may be programmed into a second flash memory die, and an older version of the firmware may be stored in a first flash memory die. In this way, programming the OTA upgrade version of the firmware into the second flash memory die does not affect any operation in the first flash memory die, allowing RWW operations in the MCU chip. As a result, the influence of erase and program operations in the flash memory dies on operating efficiency of the firmware is greatly reduced, resulting in increases in operating performance, operating efficiency, support to OTA upgrades and upgrading efficiency of the MCU chip.

Claims20

Dependent claims

A microprocessor unit (MCU) chip, comprising, packaged in a single package,

an MCU die with at least two bus interfaces, and
at least two flash memory dies, each flash memory die connected to a corresponding one of the bus interfaces, and the at least two flash memory dies configured for storage of firmware,
wherein the MCU die is configured to utilize address mapping control to convert received bus operation requests into a temporal sequence for the bus interfaces, thereby accessing each of the flash memory dies, and to program an over-the-air (OTA) upgrade version of the firmware into a second flash memory die of the flash memory dies, wherein during the course of the programming, if the OTA upgrade version of the firmware in the second flash memory die is detected to be invalid after a power-on reset or system reset, then an older version of the firmware stored in a first flash memory die of the flash memory dies is executed, or if the OTA upgrade version of the firmware in the second flash memory die is detected to be valid after the power-on reset or system reset, then the OTA upgrade version of the firmware is executed.

Dependencies are inferred from the claim text.

Facts

Application: 18/794,006Filed 5 Aug 2024
Priority: CN 202311568398.422 Nov 2023
Published: 22 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 3/0655
Making use of a particular technique: vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more…
G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance
G06F 3/0679
Single storage device: non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
G06F 8/65
Software deployment: updates

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