PIC32MX440F512H-80I/PT Microchip Technology, PIC32MX440F512H-80I/PT Datasheet - Page 473

• 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

21.2
The PIC32MX3XX/4XX RTCC module provides clock
and
calendar functions with the following features:
• 100-year clock and calendar with automatic leap
• Clock range from 00:00:00 (midnight) on January
• Clock granularity of one second with half-second
21.2.1
The RTCTIME and RTCDATE registers can be
programmed with the desired time and date numeric
values expressed in Binary Coded Decimal (BCD)
format. This simplifies users’ firmware as each of the
digit values is contained within its own 4-bit value (see
Figure 21-2).
FIGURE 21-2:
The user can configure the current time by simply writing
the desired year, month, day, hour, minutes and seconds
to the RTCTIME and RTCDATE registers. However,
these registers are write-protected and require a spe-
EXAMPLE 21-1:
© 2008 Microchip Technology Inc.
/*
*/
year detection.
1, 2000 to 23:59:59 on December 31, 2099.
visibility to the user.
0-9
0-2
(24-hr format)
HOURS
// assume the secondary oscillator is enabled and ready, i.e.
// OSCCON<1>=1, OSCCON<22>=1, and RTCC write is enabled i.e.
// RTCWREN (RTCCON<3>) =1;
YEAR
The following code example will update the RTCC time and date.
unsigned long time=0x04153300;// set time to 04 hr, 15 min, 33 sec
unsigned long date=0x06102705;// set date to Friday 27 Oct 2006
RTCCONCLR=0x8000;
while(RTCCON&0x40);
RTCTIME=time;
RTCDATE=date;
RTCCONSET=0x8000;
while(!(RTCCON&0x40));
Clock Calendar Mode
0-9
0-9
RTCC CONFIGURATION
0-1
0-5
MINUTES
MONTH
TIMER DIGIT FORMAT
UPDATING THE RTCC TIME AND DATE
0-9
0-9
0-3
0-5
SECONDS
DAY
0-9
0-9
// turn off the RTCC
// wait for clock to be turned off
// safe to update the time
// update the date
// turn on the RTCC
// wait for clock to be turned on
// can disable the RTCC write
1/2 SECOND BIT
DAY OF WEEK
(binary format)
0-6
0/1
Preliminary
cial “unlock” sequence to be performed prior to writing
to these registers. Additionally, the user should verify
that the RTCSYNC bit (RTCCON<2>) = 0 (safe to
access registers) for any read or write operations.
Refer
Example 21-3
21.2.2
The RTCTIME and RTCDATE registers can be safely
accessed when the RTCC module is disabled (ON bit
(RTCCON<15>) = 0). However, when the RTCC mod-
ule is enabled (ON bit = 1), the module provides a single
RTCSYNC bit (RTCCON<2>) that the user must use to
determine when it is safe to read and update the time
and date registers.
The RTCSYNC bit indicates a time window during which
the RTCC time registers (RTCTIME, RTCDATE) are not
about to be updated and can be safely read and written.
For read or write operations, the registers can be safely
accessed by the CPU when RTCSYNC = 0.
For a read operation when RTSYNC = 1, the user must
employ a firmware solution to assure that the data read
did not fall on an update boundary, resulting in an
invalid or partial read. For example, reading and com-
paring a Timer register value twice can ensure in code
that the register read did not span an RTCC clock
update.
Write operations to the Time and Date registers should
not be performed when RTCSYNC = 1.
Refer to Example 21-1 and Example 21-2.
PIC32MX3XX/4XX
to
SAFETY WINDOW FOR REGISTER
READS AND WRITES
Section 21.2.3
“Write
DS61143C-page 471
Lock”
and