PIC32MX440F512H-80I/PT Microchip Technology, PIC32MX440F512H-80I/PT Datasheet - Page 478

• 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

PIC32MX3XX/4XX
EQUATION 21-1:
3.
EXAMPLE 21-7:
DS61143C-page 476
/*
*/
a) If the oscillator is faster than ideal (negative
result from step 2), the CAL bits register value
needs to be negative. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
b) If the oscillator is slower than ideal (positive
result from step 2), the CAL bits register value
needs to be positive. This causes the specified
number of clock pulses to be added to the timer
counter, once every minute.
The following code example will update the RTCC calibration.
int cal=0x3FD;
if(RTCCON&0x8000)
{
}
RTCCONCLR=0x03FF0000;
RTCCONSET=cal;
(Ideal Frequency (32,758) – Measured Frequency)
unsigned intt0, t1;
do
{
}while(t0!=t1);
if((t0&0xFF)==00)
{
}
t0=RTCTIME;
t1=RTCTIME;
while(!(RTCCON&0x2)); // wait until second half...
* 60 = Error Clocks per Minute
ERROR CLOCKS PER
MINUTE
UPDATING THE RTCC CALIBRATION VALUE
// 10 bits adjustment, -3 in value
// RTCC is ON
// read valid time value
// we're at second 00, wait auto-adjust to be performed
// clear the calibration
Preliminary
4.
Writes to the CAL bits should only occur when the timer
is turned off, or immediately after the rising edge of the
seconds
(RTCTIME<15:8>) field is ‘00’ due to the possibility of
the auto-adjust event).
Note:
Load the CAL bits (RTCCON<9:0>) with the cor-
rect value.
pulse
A write to the seconds bits resets the state
It is up to the user, to include in the error
value, the initial error of the crystal drift,
due to temperature and drift due to crystal
aging.
of calibration (not its value). If an adjust-
ment just occurred, it will occur again
because of the minute roll over.
(except
© 2008 Microchip Technology Inc.
when
the
seconds