Microchip Technology Microstick for the 5V PIC24F K-series DM240013-2 DM240013-2 Data Sheet
Product codes
DM240013-2
2013 Microchip Technology Inc.
DS30003030B-page 183
PIC24FV16KM204 FAMILY
16.2.4
RTCC CONTROL REGISTERS
REGISTER 16-1: RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER
R/W-0
U-0
R/W-0
R-0, HSC
R-0, HSC
R/W-0
R/W-0
R/W-0
RTCEN
)
—
RTCWREN
RTCSYNC
HALFSEC
RTCOE
RTCPTR1
RTCPTR0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
CAL7
CAL6
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
bit 7
bit 0
Legend:
HSC = Hardware Settable/Clearable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
RTCEN:
RTCC Enable bit
1
= RTCC module is enabled
0
= RTCC module is disabled
bit 14
Unimplemented:
Read as ‘0’
bit 13
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
bit 12
RTCSYNC:
RTCC Value Registers Read Synchronization bit
1
= RTCVALH, RTCVALL and ALCFGRPT registers can change while reading due to a rollover ripple
resulting in an invalid data read. If the register is read twice and results in the same data, the data
can be assumed to be valid.
can be assumed to be valid.
0
= RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
bit 11
HALFSEC:
Half Second Status bit
(
1
= Second half period of a second
0
= First half period of a second
bit 10
RTCOE:
RTCC Output Enable bit
1
= RTCC output is enabled
0
= RTCC output is disabled
bit 9-8
RTCPTR<1:0>:
RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading the RTCVALH and RTCVALL registers.
The RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
00
The RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
00
= MINUTES
01
= WEEKDAY
10
= MONTH
11
= Reserved
RTCVAL<7:0>:
00
00
= SECONDS
01
= HOURS
10
= DAY
11
= YEAR
Note 1:
The RCFGCAL register is only affected by a POR.
2:
A write to the RTCEN bit is only allowed when RTCWREN = 1.
3:
This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.