C8051F930DK Silicon Laboratories Inc, C8051F930DK Datasheet - Page 164
C8051F930DK
Manufacturer Part Number
C8051F930DK
Description
KIT DEV C8051F920,F921,F930,F931
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F930DK
Contents
Target Board, Power Adapter, USB Debug Adapter, Cables, Batteries, and Software
Processor To Be Evaluated
C8051F930
Processor Series
C8051F9xx
Data Bus Width
8 bit
Interface Type
I2C, UART, SPI
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
0.9 V to 3.6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F920, F921, F930, F931
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1473
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F930DK
Manufacturer:
Silicon Labs
Quantity:
135
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C8051F93x-C8051F92x
15. Cyclic Redundancy Check Unit (CRC0)
C8051F93x-C8051F92x devices include a cyclic redundancy check unit (CRC0) that can perform a CRC
using a 16-bit or 32-bit polynomial. CRC0 accepts a stream of 8-bit data written to the CRC0IN register.
CRC0 posts the 16-bit or 32-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 15.1. CRC0 also has a bit
reverse register for quick data manipulation.
15.1. CRC Algorithm
The C8051F93x-C8051F92x CRC unit generates a CRC result equivalent to the following algorithm:
164
1. XOR the input with the most-significant bits of the current CRC result. If this is the first iteration
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
example.
of the CRC unit, the current CRC result will be the set initial value
(0x00000000 or 0xFFFFFFFF).
polynomial.
CRC0FLIP
CRC0FLIP
CRC0PNT1
CRC0PNT0
CRC0SEL
CRC0INIT
CRC0VAL
Write
Read
Figure 15.1. CRC0 Block Diagram
CRC0IN
8
CRC Engine
Rev. 1.1
8
8
RESULT
4 to 1 MUX
32
8
8
8
Automatic CRC
8
Controller
CRC0AUTO
CRC0DAT
CRC0CNT
Memory
Flash
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