C8051F996DK Silicon Laboratories Inc, C8051F996DK Datasheet - Page 170
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C8051F996DK
Manufacturer Part Number
C8051F996DK
Description
KIT DEV FOR C8051F996
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheets
1.C8051F996DK.pdf
(24 pages)
2.C8051F996DK.pdf
(2 pages)
3.C8051F996DK.pdf
(4 pages)
4.C8051F996DK.pdf
(322 pages)
Specifications of C8051F996DK
Contents
Board, Batteries, Cables, CDs, Debug Adapter, Documentation, Power Adapter
Processor To Be Evaluated
C8051F996
Processor Series
C8051F98x
Interface Type
USB
Operating Supply Voltage
3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F996
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1963
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C8051F99x-C8051F98x
16. Cyclic Redundancy Check Unit (CRC0)
C8051F99x-C8051F98x devices include a cyclic redundancy check unit (CRC0) that can perform a CRC
using a 16-bit polynomial. CRC0 accepts a stream of 8-bit data written to the CRC0IN register. CRC0 posts
the 16-bit result to an internal register. The internal result register may be accessed indirectly using the
CRC0PNT bits and CRC0DAT register, as shown in Figure 16.1. CRC0 also has a bit reverse register for
quick data manipulation.
16.1. CRC Algorithm
The C8051F99x-C8051F98x CRC unit generates a CRC result equivalent to the following algorithm:
1. XOR the input with the most-significant bits of the current CRC result. If this is the first iteration of the
2a. If the MSB of the CRC result is set, shift the CRC result and XOR the result with the selected
2b. If the MSB of the CRC result is not set, shift the CRC result.
Repeat Steps 2a/2b for the number of input bits (8). The algorithm is also described in the following exam-
ple.
170
CRC unit, the current CRC result will be the set initial value
(0x00000000 or 0xFFFFFFFF).
polynomial.
CRC0FLIP
CRC0FLIP
CRC0PNT0
CRC0SEL
CRC0INIT
CRC0VAL
Write
Read
Figure 16.1. CRC0 Block Diagram
CRC0IN
CRC Engine
Rev. 1.0
8
8
RESULT
2 to 1 MUX
16
8
8
8
Automatic CRC
Controller
CRC0AUTO
CRC0DAT
CRC0CNT
Memory
Flash
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