C8051F960-B-GM Datasheet, PDF (167/492 Pages) Silicon Laboratories – Ultra Low Power 128K, LCD MCU Family

C8051F96x
12.6. CRC0 Bit Reverse Feature
CRC0 includes hardware to reverse the bit order of each bit in a byte as shown in Figure 12.2. 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.
CRC0FLIP
Write
CRC0FLIP
Read
Figure 12.2. Bit Reverse Register
SFR Definition 12.6. CRC0FLIP: CRC0 Bit Flip
Bit
7
6
5
4
3
2
1
0
Name
CRC0FLIP[7:0]
Type
R/W
Reset
0
0
0
0
0
0
0
0
SFR Page = 0xF; SFR Address = 0x95
Bit
Name
Function
7:0 CRC0FLIP[7:0] CRC0 Bit Flip.
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.
Rev. 1.0
167