M30245FCGP#U1 Renesas Electronics America, M30245FCGP#U1 Datasheet - Page 181

• Manufacturer Part Number: M30245FCGP#U1
• Description: IC M16C/24 MCU FLSH 128K 100LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/20r

Specifications of M30245FCGP#U1

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, SSI, UART/USART, USB
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-LQFP
• Package: 100LQFP
• Family Name: R8C
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 82
• Interface Type: USB/UART/I2C/SPI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M30245 Group
Figure 1.131. CRC example using CRC-CCITT (LSB first mode)
Rev.2.00
REJ03B0005-0200
(1) Setting 0000
(2) Setting 01
(3) Setting 23
Oct 16, 2006
The code resulting from sending 01
(X
conformity with the modulo-2 operation.
Thus the CRC code becomes (1001 0001 1000 1000). Since the operation is in LSB first mode, the (1001 0001 1000 1000)
corresponds to 1189
selection bit to "1". CRC data register stores CRC code for MSB first mode.
16
+ X
16
16
1 0001 0000 0010 0001
16
12
+ X
5
+ 1), becomes the remainder resulting from dividing (1000 0000) X
page 179 of 264
b15
b15
b15
16
in hexadecimal notation. If the CRC operation in MSB first mode is necessary, set the CRC mode
LSB
9
1000 0000 0000 0000 0000 0000
1000 1000 0001 0000 1
1189
0A41
16
8
LSB
in LSB first mode is (1000 0000). Thus the CRC code in the generating polynomial,
b7
b7
16
1000 0001 0000 1000 0
1000 1000 0001 0000 1
16
1001 0001 1000 1000
1
1
b0
b0
b0
b0
b0
1000 1000
2 cycles
After CRC calculation is complete
CRC data register
Stores CRC code
After CRC calculation is complete
CRC data register
Stores CRC code
CRC data register
CRC input register
CRC input register
MSB
MSB
CRCD
16
[03BD
CRCIN
CRCD
CRCIN
[03BE
[03BD
[03BE
CRCD
[03BD
by (1 0001 0000 0010 0001) in
16
16
16
16
16
Modulo-2 operation is
operation that complies
with the law given below.
, 03BC
]
, 03BC
]
, 03BC
CRC Calculation Circuit
16
16
16
0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 0
]
]
]
-1 = 1