UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 891

• Manufacturer Part Number: UPD70F3738GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3738GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

27.4 Operation
polynomial X
code become (1000 0000 0000 0000 0000 0000) and the code is divided by (1 0001 0000 0010 0001) by using a
modulo-2 operation formula.
An example of the operation of the CRC circuit is shown below.
The code when 01H is sent LSB first is (1000 0000). Therefore, the CRC code calculated by using the generation
A modulo-2 operation is performed based on the following formula.
Remark
0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 0
1 0001 0000 0010 0001 1000 0000 0000 0000 0000 0000
Therefore, the CRC code becomes
1189H in hexadecimal notation.
16
−1 = 1
+ X
12
(1) Setting of CRCIN to 01H
(2) Reading the CRCD register
+ X
This is an example when 0000H is written to the CRCD register as the initial value.
5
+ 1 is the remainder when sixteen digits of zero are appended to (1000 0000) to make the
Figure 27-2. CRC Circuit Operation Example (LSB First)
LSB
1000 1000 0001 0000 1
LSB
1000 0001 0000 1000 0
1000 1000 0001 0000 1
CHAPTER 27 CRC FUNCTION
User’s Manual U18953EJ5V0UD
1001 0001 1000 1000
1001
9
0001 1000 1000
b15
8
1000 1000
1
1
1189H
MSB
. Since LSB-first is used, this corresponds to
MSB
b7
CRC code is stored
01H
b0
b0
889