PIC24FJ128GA MICROCHIP [Microchip Technology], PIC24FJ128GA Datasheet - Page 154

• Manufacturer Part Number: PIC24FJ128GA
• Description: General Purpose, 16-Bit Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

PIC24FJ128GA FAMILY
REGISTER 18-1:
DS39747C-page 152
Upper Byte:
bit 15
bit 9-8
bit 7-0
RTCEN
R/W-0
(2)
RTCPTR1:RTCPTR0: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading 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 = MINUTES
01 = WEEKDAY
10 = MONTH
11 = Reserved
RTCVAL<7:0>:
00 = SECONDS
01 = HOURS
10 = DAY
11 = YEAR
CAL7:CAL0: RTC Drift Calibration bits
01111111 = Maximum positive adjustment; adds 508 RTC clock pulses every one minute
...
01111111 = Minimum positive adjustment; adds 4 RTC clock pulses every one minute
00000000 = No adjustment
11111111 = Minimum negative adjustment; subtracts 4 RTC clock pulses every one minute
...
10000000 = Maximum negative adjustment; subtracts 512 RTC clock pulses every one minute
Legend:
R = Readable bit
-n = Value at POR
Note 1: The RCFGCAL register is only affected by a POR.
U-0
—
Lower Byte:
bit 7
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
R/W-0
CAL7
RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER
(CONTINUED)
RTCWREN RTCSYNC HALFSEC
R/W-0
R/W-0
CAL6
W = Writable bit
‘1’ = Bit is set
R-0
R/W-0
CAL5
Preliminary
R-0
R/W-0
CAL4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
RTCOE
R/W-0
R/W-0
CAL3
RTCPTR1 RTCPTR0
R/W-0
R/W-0
CAL2
© 2006 Microchip Technology Inc.
R/W-0
x = Bit is unknown
bit 8
R/W-0
CAL1
(1)
R/W-0
CAL0
bit 0