C8051F70X_0910 Datasheet, PDF (113/290 Pages) Silicon Laboratories – Mixed Signal ISP Flash MCU Family

C8051F70x/71x
17. In-System Device Identification
The C8051F70x/71x has SFRs that identify the device family and derivative. These SFRs can be read by
firmware at runtime to determine the capabilities of the MCU that is executing code. This allows the same
firmware image to run on MCUs with different memory sizes and peripherals, and dynamically changing
functionality to suit the capabilities of that MCU.
In order for firmware to identify the MCU, it must read three SFRs. HWID describes the MCU’s family,
DERIVID describes the specific derivative within that device family, and REVID describes the hardware
revision of the MCU.
SFR Definition 17.1. HWID: Hardware Identification Byte
Bit
7
6
5
4
3
2
1
0
Name
HWID[7:0]
Type
R
R
R
R
R
R
R
R
Reset
1
1
1
0
0
0
0
1
SFR Address = 0xC4; SFR Page = F
Bit
Name
Description
7:0 _HWID[7:0]
Hardware Identification byte
Describes the MCU family.
0xE1: Devices covered in this document (C8051F70x/71x)
SFR Definition 17.2. DERIVID: Derivative Identification Byte
Bit
Name
Type
Reset
7
R
Varies
6
R
Varies
5
R
Varies
4
3
DERIVID[7:0]
R
R
Varies
Varies
2
R
Varies
1
R
Varies
0
R
Varies
SFR Address = 0xEC; SFR Page = F
Bit
Name
Description
7:0 _{DERIVID[7:0] Derivative Identification byte}
Shows the C8051F70x/71x derivative being used.
0xD0: C8051F700; 0xD1: C8051F701; 0xD2: C8051F702; 0xD3: C8051F703
0xD4: C8051F704; 0xD5: C8051F705; 0xD6: C8051F706; 0xD7: C8051F707
0xD8: C8051F708; 0xD9: C8051F709; 0xDA: C8051F710; 0xDB: C8051F711
0xDC: C8051F712; 0xDD: C8051F713; 0xDE: C8051F714; 0xDF: C8051F715
Rev. 0.3
113