GigaDevice Semiconductor GD32F3x0 - Device Electronic Signature

GD32F3x0 User Manual
39
1.7. Device electronic signature
The device electronic signature contains memory density information and the 96-bit unique
device ID. It is stored in the information block of the Flash memory. The 96-bit unique device
ID is unique for any device. It can be used as serial numbers, or part of security keys, etc.
1.7.1. Memory density information
Base address: 0x1FFF F7E0
The value is factory programmed and can never be altered by user.
This register has to be accessed by word (32-bit).
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SRAM_DENSITY[15:0]
r
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
FLASH_DENSITY[15:0]
r
Bits
Fields
Descriptions
31:16
SRAM_DENSITY
[15:0]
SRAM density
The value indicates the on-chip SRAM density of the device in Kbytes.
Example: 0x0008 indicates 8 Kbytes.
15:0
FLASH_DENSITY
[15:0]
Flash memory density
The value indicates the Flash memory density of the device in Kbytes.
Example: 0x0020 indicates 32 Kbytes.
1.7.2. Unique device ID (96 bits)
Base address: 0x1FFF F7AC
The value is factory programmed and can never be altered by user.
This register has to be accessed by word (32-bit).
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
UNIQUE_ID[31:16]
r
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
UNIQUE_ID[15:0]
r
Bits
Fields
Descriptions