C8051F93X-C8051F92X 데이터 시트보기 (PDF) - Silicon Laboratories

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C8051F93X-C8051F92X

Single/Dual Battery, 0.9–3.6 V, 64/32 kB, SmaRTClock, 10-Bit ADC MCU

Silicon Laboratories 

C8051F93x-C8051F92x

15.6. CRC0 Bit Reverse Feature

CRC0 includes hardware to reverse the bit order of each bit in a byte as shown in Figure 15.2. 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 15.2. Bit Reverse Register

SFR Definition 15.6. 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.

174

Rev. 1.3

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