参数资料
型号: M30600E8GP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数: 137/139页
文件大小: 1782K
代理商: M30600E8GP
Mitsubishi microcomputers
M16C / 60 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
CRC Calculation Circuit
97
CRC Calculation Circuit
The Cyclic Redundancy Check (CRC) calculation circuit detects an error in data blocks. The microcom-
puter uses a generator polynomial of CRC_CCITT (X16 + X12 + X5 + 1) to generate CRC code.
The CRC code is a 16-bit code generated for a block of a given data length in multiples of 8 bits. The CRC
code is set in a CRC data register each time one byte of data is transferred to a CRC input register after
writing an initial value into the CRC data register. Generation of CRC code for one byte of data is com-
pleted in two machine cycles.
Figure 1.82 shows a block diagram of the CRC circuit. Figure 1.83 shows the configuration of CRC-related
registers.
Figure 1.82. Block diagram of CRC circuit
CRC code generating circt
x16 + x12 + x5 + 1
Eight low-order bits
Eight high-order bits
Data bus high-order bits
Data bus low-order bits
CRC data register (16)
CRC input register (8)
(Addresses 03BD16, 03BC16)
(Address 03BE16)
Figure 1.83. Configuration of CRC-related registers
Symbol
Address
When reset
CRCD
03BD16, 03BC16
Indeterminate
b7
b0 b7
b0
(b15)
(b8)
CRC data register
W
R
CRC calculation result output register
Function
Values that
can be set
000016 to FFFF16
Symbo
Address
When reset
CRCIN
03BE16
Indeterminate
b7
b0
CRC input register
W
R
Data input register
Function
Values that
can be set
0016 to FF16
相关PDF资料
PDF描述
M30600M8-XXXGP 16-BIT, MROM, MICROCONTROLLER, PQFP100
M30610MCA-XXXGP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
M30610ECFS 16-BIT, UVPROM, 10 MHz, MICROCONTROLLER, CQCC100
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M30610ECGP 16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP100
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