PIC18F24J11 MICROCHIP [Microchip Technology], PIC18F24J11 Datasheet - Page 229

• Manufacturer Part Number: PIC18F24J11
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

17.1.1
REGISTER 17-1:
 2011 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
Note 1:
RTCEN
R/W-0
2:
3:
(2)
The RTCCFG register is only affected by a POR.
A write to the RTCEN bit is only allowed when RTCWREN = 1.
This bit is read-only. It is cleared to ‘0’ on a write to the lower half of the MINSEC register.
RTCC CONTROL REGISTERS
RTCEN: RTCC Enable bit
1 = RTCC module is enabled
0 = RTCC module is disabled
Unimplemented: Read as ‘0’
RTCWREN: RTCC Value Registers Write Enable bit
1 = RTCVALH and RTCVALL registers can be written to by the user
0 = RTCVALH and RTCVALL registers are locked out from being written to by the user
RTCSYNC: RTCC Value Registers Read Synchronization bit
1 = RTCVALH, RTCVALL and ALRMRPT registers can change while reading due to a rollover ripple
If the register is read twice and results in the same data, the data can be assumed to be valid.
0 = RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
HALFSEC: Half-Second Status bit
1 = Second half period of a second
0 = First half period of a second
RTCOE: RTCC Output Enable bit
1 = RTCC clock output enabled
0 = RTCC clock output disabled
RTCPTR<1:0>: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading the RTCVALH<7:0> and
RTCVALL<7:0> registers; the RTCPTR<1:0> value decrements on every read or write of
RTCVALH<7:0> until it reaches ‘00’.
RTCVALH<7:0>:
00 = Minutes
01 = Weekday
10 = Month
11 = Reserved
RTCVALL<7:0>:
00 = Seconds
01 = Hours
10 = Day
11 = Year
resulting in an invalid data read
U-0
—
RTCCFG: RTCC CONFIGURATION REGISTER (BANKED F3Fh)
W = Writable bit
‘1’ = Bit is set
RTCWREN
R/W-0
(2)
RTCSYNC HALFSEC
R-0
(3)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
PIC18F46J11 FAMILY
R-0
(3)
RTCOE
R/W-0
x = Bit is unknown
RTCPTR1
R/W-0
(1)
DS39932D-page 229
RTCPTR0
R/W-0
bit 0