PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 237

• Manufacturer Part Number: PIC18F25J50
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

17.1.4
An attempt to write to the RTCEN bit while
RTCWREN = 0 will be ignored. RTCWREN must be
set before a write to RTCEN can take place.
Like the RTCEN bit, the RTCVALH and RTCVALL
registers can only be written to when RTCWREN = 1.
A write to these registers, while RTCWREN = 0, will be
ignored.
FIGURE 17-2:
FIGURE 17-3:
 2011 Microchip Technology Inc.
RTCEN BIT WRITE
0-9
0-2
0-2
(24-hour format)
(24-hour format)
Hours
Hours
Year
TIMER DIGIT FORMAT
ALARM DIGIT FORMAT
0-9
0-9
0-9
0-5
0-1
0-5
0-1
Minutes
Minutes
Month
Month
0-9
0-9
0-9
0-9
PIC18F46J50 FAMILY
17.2
17.2.1
The register interface for the RTCC and alarm values is
implemented using the Binary Coded Decimal (BCD)
format. This simplifies the firmware, when using the
module, as each of the digits is contained within its own
4-bit value (see
0-5
0-3
0-5
0-3
Seconds
Seconds
Operation
Day
Day
REGISTER INTERFACE
Figure 17-2
0-9
0-9
0-9
0-9
and
1/2 Second Bit
Day Of Week
(binary format)
Figure
Day Of Week
DS39931D-page 237
0-6
0-6
0/1
17-3).