C8051T600QDB Silicon Laboratories Inc, C8051T600QDB Datasheet - Page 99
![BOARD SOCKET DAUGHTER QFN](/photos/9/3/90365/c8051t600qdb_sml.jpg)
C8051T600QDB
Manufacturer Part Number
C8051T600QDB
Description
BOARD SOCKET DAUGHTER QFN
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051T600EDB.pdf
(188 pages)
Specifications of C8051T600QDB
Module/board Type
Socket Module - QFN
Data Bus Width
8 bit
Operating Supply Voltage
+ 1.8 V to + 3.6 V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051T600DK
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1406
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The CRC calculation begins at address 0x0000 and ends at the end of user EPROM space. The EPBusy
bit in register C2ADD will be set during the CRC operation, and cleared once the operation is complete.
The 32-bit results will be available in the CRC3-0 registers. CRC3 is the MSB, and CRC0 is the LSB. The
polynomial used for the 32-bit CRC calculation is 0x04C11DB7.
Note: If a 16-bit CRC has been performed since the last device reset, a device reset should be initiated
before performing a 32-bit CRC operation.
20.3.2. Performing 16-bit CRCs on 256-Byte EPROM Blocks
A 16-bit CRC of individual 256-byte blocks of EPROM can be initiated by writing to the CRC0 byte over the
C2 interface. The value written to CRC0 is the high byte of the beginning address for the CRC. For exam-
ple, if CRC0 is written to 0x02, the CRC will be performed on the 256 bytes beginning at address 0x0200,
and ending at address 0x2FF. The EPBusy bit in register C2ADD will be set during the CRC operation, and
cleared once the operation is complete. The 16-bit results will be available in the CRC1-0 registers. CRC1
is the MSB, and CRC0 is the LSB. The polynomial for the 16-bit CRC calculation is 0x1021
20.3. Program Memory CRC
A CRC engine is included on-chip, which provides a means of verifying EPROM contents once the device
has been programmed. The CRC engine is available for EPROM verification even if the device is fully read
and write locked, allowing for verification of code contents at any time.
The CRC engine is operated through the C2 debug and programming interface, and performs 16-bit CRCs
on individual 256-byte blocks of program memory, or a 32-bit CRC the entire memory space. To prevent
hacking and extrapolation of security-locked source code, the CRC engine will only allow CRCs to be per-
formed on contiguous 256-byte blocks beginning on 256-byte boundaries (lowest 8-bits of address are
0x00). For example, the CRC engine can perform a CRC for locations 0x0400 through 0x04FF, but it can-
not perform a CRC for locations 0x0401 through 0x0500, or on block sizes smaller or larger than
256 bytes.
20.3.1. Performing 32-bit CRCs on Full EPROM Content
A 32-bit CRC on the entire EPROM space is initiated by writing to the CRC1 byte over the C2 interface.
Rev. 1.2
C8051T600/1/2/3/4/5/6
99
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