PIC18F87K22-I/PTRSL Microchip Technology, PIC18F87K22-I/PTRSL Datasheet - Page 236

• Manufacturer Part Number: PIC18F87K22-I/PTRSL
• Description: MCU PIC 128K FLASH XLP 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F87K22-I/PTRSL

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: EBI/EMI, I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC18F87K22 FAMILY
18.2.2
As mentioned earlier, the RTCC module is intended to
be clocked by an external Real-Time Clock crystal
oscillating at 32.768 kHz, but an internal oscillator can
be used. The RTCC clock selection is decided by the
RTCOSC bit (CONFIG3L<0>).
FIGURE 18-4:
18.2.2.1
The RTCC module can be clocked by an external,
32.768 kHz crystal (SOSC oscillator) or the LF-INTOSC
oscillator, which can be selected in CONFIG3L<0>.
If the external clock is used, the SOSC oscillator should
be enabled. If LF-INTOSC is providing the clock, the
INTOSC clock can be brought out to the RTCC pin by
the RTSECSEL<1:0> bits (PADCFG<2:1>).
18.2.3
This section explains which timer values are affected
when there is a rollover:
• Time of Day: From 23:59:59 to 00:00:00 with a
• Month: From 12/31 to 01/01 with a carry to the
• Day of Week: From 6 to 0 with no carry (see
• Year Carry: From 99 to 00; this also surpasses the
For the day-to-month rollover schedule, see Table 18-2.
Because the following values are in BCD format, the
carry to the upper BCD digit occurs at the count of 10,
not 16 (SECONDS, MINUTES, HOURS, WEEKDAY,
DAYS and MONTHS).
DS39960B-page 236
carry to the Day field
Year field
Table 18-1)
use of the RTCC
Note 1:
32.768 kHz XTAL
from SOSC
Internal RC
RTCCFG
CLOCK SOURCE
DIGIT CARRY RULES
Real-Time Clock Enable
Writing to the lower half of the MINSEC register resets all counters, allowing fraction of a second synchronization;
clock prescaler is held in Reset when RTCEN =
CLOCK SOURCE MULTIPLEXING
Second
Clock Prescaler
Hour:Minute
1:16384
Preliminary
(1)
0
.
Day of Week
module to yield an error of 3 seconds or less per month.
Calibration of the crystal can be done through this
(For further details, see Section 18.2.9 “Calibration”.)
TABLE 18-1:
TABLE 18-2:
Half-Second
Note 1:
Clock
Day
09 (September)
11 (November)
12 (December)
02 (February)
01 (January)
10 (October)
08 (August)
03 (March)
06 (June)
04 (April)
05 (May)
07 (July)
Wednesday
Month
Thursday
Saturday
Tuesday
Monday
See Section 18.2.4 “Leap Year”.
Sunday
Friday
Half second
DAY OF WEEK SCHEDULE
DAY TO MONTH ROLLOVER
SCHEDULE
Day of Week
Month
(1)
 2010 Microchip Technology Inc.
Maximum Day Field
One Second Clock
28 or 29
31
31
30
31
30
31
31
30
31
30
31
0
1
2
3
4
5
6
Year
(1)