C8051F986-GUR Silicon Labs, C8051F986-GUR Datasheet - Page 177

• Manufacturer Part Number: C8051F986-GUR
• Description: 8-bit Microcontrollers - MCU 8kB 512B RAM 12b ADC
• Manufacturer: Silicon Labs

Specifications of C8051F986-GUR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

16.5. CRC0 Bit Reverse Feature
CRC0 includes hardware to reverse the bit order of each bit in a byte as shown in Figure 16.2. Each byte
of data written to CRC0FLIP is read back bit reversed. For example, if 0xC0 is written to CRC0FLIP, the
data read back is 0x03. Bit reversal is a useful mathematical function used in algorithms such as the FFT.
SFR Definition 16.6. CRC0FLIP: CRC0 Bit Flip
SFR Page = All; SFR Address = 0x9C
Name
Reset
Bit
7:0
Type
Bit
CRC0FLIP[7:0] CRC0 Bit Flip.
Name
7
0
Any byte written to CRC0FLIP is read back in a bit-reversed order, i.e. the written
LSB becomes the MSB. For example:
If 0xC0 is written to CRC0FLIP, the data read back will be 0x03.
If 0x05 is written to CRC0FLIP, the data read back will be 0xA0.
6
0
Figure 16.2. Bit Reverse Register
5
0
CRC0FLIP
CRC0FLIP
Read
Write
Rev. 1.1
CRC0FLIP[7:0]
4
0
R/W
C8051F99x-C8051F98x
Function
3
0
2
0
1
0
0
0
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