PIC32MX440F512H-80I/PT Microchip Technology, PIC32MX440F512H-80I/PT Datasheet - Page 239

• Manufacturer Part Number: PIC32MX440F512H-80I/PT
• Description: IC PIC MCU FLASH 512K 64-TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 32MXr

Specifications of PIC32MX440F512H-80I/PT

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 64-TFQFP
• Core Processor: MIPS32® M4K™
• Core Size: 32-Bit
• Speed: 80MHz
• Connectivity: I²C, IrDA, LIN, PMP, SPI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 53
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 2.3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC32MX4xx
• Core: MIPS
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: I2C , SPI , UART
• Maximum Clock Frequency: 80 MHz
• Number Of Programmable I/os: 51
• Number Of Timers: 5 x 16 bit, 1 x 32 bit
• Operating Supply Voltage: 2.3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, DM320003, DM320002, MA320002
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Controller Family/series: PIC32
• No. Of I/o's: 51
• Ram Memory Size: 32KB
• Cpu Speed: 80MHz
• No. Of Timers: 5
• Embedded Interface Type: EUART, I2C, PSP, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC244003 - TEST BD MPLAB REAL ICE LOOPBACKDM320003 - BOARD DEMO USB PIC32 OTGAC244006 - KIT MPLAB REAL ICE TRACEAC164327 - MODULE SKT FOR 64TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

EXAMPLE 10-5:
© 2008 Microchip Technology Inc.
/*
The following code example illustrates a DMA calculation using the CRC append mode. The CRC of a
200 bytes flash buffer is calculated without performing any data transfer. As soon as the CRC
calculation is completed the CRC value of the flash buffer is available in a local variable for
further use. */
unsigned int blockCrc;
IEC1CLR=0x00010000;
IFS1CLR=0x00010000;
DMACONSET=0x00008000;
DCRCDATA=0xffff;
DCRCXOR=0x1021;
DCRCCON=0x0fc0;
DCH0CON=0x03;
DCH0ECON=0;
DCH0SSA=VirtToPhys(flashBuff);
DCH0DSA=VirtToPhys(&blockCrc);
DCH0SSIZ=200;
DCH0DSIZ=200;
DCH0CSIZ=200;
DCH0INTCLR=0x00ff00ff;
DCH1INTCLR=0x00ff00ff;
DCH0CONSET=0x80;
DCH0ECONSET=0x00000080;
// do something else while the CRC calculation takes place
// poll to see that the transfer was done
BOOL error=FALSE;
while(TRUE)
{
}
if(error)
{
}
// the block CRC is available in the blockCrc variable
register int pollCnt;
int dmaFlags=DCH0INT;
if( (dmaFlags& 0x3)
{
}
pollCnt=100;
while(pollCnt--);
error=TRUE;
break;
}
{
CRC APPEND MODE OPERATION
else if (dmaFlags&0x8)
break;
// process error
// CRC of the flash block
// disable DMA channel 0 interrupts
// clear any existing DMA channel 0 interrupt flag
// enable the DMA controller
// seed the CRC generator
// Use the standard CCITT CRC 16 polynomial: X^16+X^12+X^5+1
// CRC enabled, polynomial length 16, append mode
// CRC attached to the DMA channel 0.
// channel off, priority 3, no chaining
// no start irqs, no match enabled
// program channel transfer
// transfer source physical address
// transfer destination physical address
// source size
// dst size
// 200 bytes per transfer
// DMA0: clear events, disable interrupts
// DMA1: clear events, disable interrupts
// channel 0 on
// initiate a transfer
// set CFORCE to 1
// don’t poll in a tight loop
// CHERIF (DCHxINT<0>) or CHTAIF (DCHxINT<1> set
// error or aborted...
// CHBCIF (DCHxINT<3>) set
// transfer completed normally
// use an adjusted value here
// wait before polling again
Preliminary
PIC32MX3XX/4XX
DS61143C-page 237