LPC2478FBD208,551 NXP Semiconductors, LPC2478FBD208,551 Datasheet - Page 280

• Manufacturer Part Number: LPC2478FBD208,551
• Description: IC ARM7 MCU 512K LCD 208-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC2400r

Specifications of LPC2478FBD208,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 208-LQFP
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Ram Size: 96K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC24
• Core: ARM7TDMI-S
• Data Bus Width: 16 bit, 32 bit
• Data Ram Size: 98 KB
• Interface Type: CAN/I2C/I2S/IrDA/SPI/SSP/UART/USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 160
• Number Of Timers: 4
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, DK-35TS-LPC2478, DK-57TS-LPC2478, DK-57VTS-LPC2478, SOMDIMM-LPC2478, SAB-TFBGA208, KSK-LPC2478-JL, MCB2470
• Development Tools By Supplier: OM11015, OM11019, OM11022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• On-chip Dac: 1-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1034 - PROGRAMMERS, DEVELOPMENT SYSTEMS622-1033 - KIT LCD TOUCH 5.7" FOR LPC2478MCB2470 - BOARD EVAL NXP LPC247X SERIESOM11022 - EVAL LPC-STICK WITH LPC2478OM11019 - BOARD EVAL FOR LPC2478568-4742 - MODULE DIMM LPC2478 ARM7568-4741 - KIT LCD TOUCH 5.7" FOR LPC2478622-1028 - KIT LCD TOUCH 5.7" FOR LPC2478KSDKLPC2478-PL - KIT IAR KICKSTART NXP LPC2478622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4369 - BOARD EVAL FOR LPC2478622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4363; 935284069551; LPC2478FBD208-S

NXP Semiconductors
UM10237_4
User manual
int crc_calc(char frame_no_fcs[], int frame_len) {
}
For FCS calculation, this function is passed a pointer to the first byte of the frame and the
length of the frame without the FCS.
For hash filtering, this function is passed a pointer to the destination address part of the
frame and the CRC is only calculated on the 6 address bytes. The hash filter uses bits
[28:23] for indexing the 64 bits { HashFilterH, HashFilterL } vector. If the corresponding bit
is set the packet is passed, otherwise it is rejected by the hash filter.
For obtaining the destination and source address hash CRCs, this function calculates first
both the 32 bit CRCs, then the nine most significant bits from each 32 bit CRC are
extracted, concatenated, and written in every StatusHashCRC word of every fragment
status.
int
int
char byte; // current byte
int
int q0, q1, q2, q3;
crc = 0xFFFFFFFF;
for (i = 0; i < frame_len; i++) {
}
return crc;
i;
j;
crc; // CRC result
byte = *frame_no_fcs++;
for (j = 0; j < 2; j++) {
}
// iterator
// another iterator
if (((crc >> 28) ^ (byte >> 3)) & 0x00000001) {
} else {
}
if (((crc >> 29) ^ (byte >> 2)) & 0x00000001) {
} else {
}
if (((crc >> 30) ^ (byte >> 1)) & 0x00000001) {
} else {
}
if (((crc >> 31) ^ (byte >> 0)) & 0x00000001) {
} else {
}
crc = (crc << 4) ^ q3 ^ q2 ^ q1 ^ q0;
byte >>= 4;
Rev. 04 — 26 August 2009
q3 = 0x04C11DB7;
q3 = 0x00000000;
q2 = 0x09823B6E;
q2 = 0x00000000;
q1 = 0x130476DC;
q1 = 0x00000000;
q0 = 0x2608EDB8;
q0 = 0x00000000;
// temporary variables
Chapter 11: LPC24XX Ethernet
UM10237
© NXP B.V. 2009. All rights reserved.
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