6 Bitstream File Configuration
UG290-2.3E
78(87)
Lock AES Key
Locking the AES Key prevents the Key leakage. After locking the AES
Key, you will not be able to read and configure the AES Key.
Figure 6-8 Lock AES Key Flow
6.3
Configuration File Size
The Gowin bitstream format can be Text (ASCii) with annotations or
Binary with no annotations. The file with a .fs suffix is a text format file.
Lines beginning with “//” are annotations. The others is the bitstream data.
The file with a .bin suffix is a binary format file, with no annotations. This
binary format file is commonly used for embedded programming. Users
can configure the bitstream file format in Gowin software.
1. Open the Gowin software;
Transmit Program EFuse
Command (0x24)
note:
Start the 2.5 V circuit to get the voltage ready
before program efuse
Transmit Security
Command (0x23)
Transmit 128 bits of data
Delay
800 ms
Transmit Read ID
Command ( 0x11)
or others
note:
Just transmit a command to end the 2.5v circuit
,such as ReadID.
Stop
C
Set data[127:125] as "1" and all others data bits as "0"
Transmit ISC Enable
Command (0x15)
Transmit ISC Disable
Command (0x3A)