2.3. eFuse U-boot Command Reference¶
The u-boot provides the following commands to access eFuse.
efuser: Dump the eFuse area.
efusew: Write to eFuse area.
2.3.1. efuser¶
- 【Description】
Dump the eFuse area.
- 【Syntax】
efuser EFUSE_AREA
- 【Parameter】
Parameter
Description
EFUSE_AREA
eFuse area name, please refer to eFuse user writable area and eFuse security setting fields.
- 【Example】
Print user-defined area data
cv181x/cv180x# efuser USER 00000000: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00000020: 00 00 00 00 00 00 00 00 ........ cv181x/cv180x#
2.3.2. efusew¶
- 【Description】
Write to eFuse area
- 【Syntax】
efuser EFUSE_AREA DATA
- 【Parameter】
Parameter
Description
EFUSE_AREA
eFuse area name, please refer to eFuse user writable area and eFuse security setting fields.
DATA
Data for writing into eFuse, expressed in hexadecimal.
- 【Example】
Write data 030201 to user-defined area
cv181x/cv180x# efusew USER 030201 Write eFuse USER(0) with: 00000000: 03 02 01 ... cv181x/cv180x# efuser USER 00000000: 03 02 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00000020: 00 00 00 00 00 00 00 00 ........ cv181x/cv180x#