Datasheet

PIC24FJ64GA104 FAMILY
DS39951C-page 244  2010 Microchip Technology Inc.
REGISTER 25-4: CW4: FLASH CONFIGURATION WORD 4
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 15 bit 8
R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
DSWDTEN DSBOREN RTCOSC DSWDTOSC DSWDTPS3 DSWDTPS2 DSWDTPS1 DSWDTPS0
bit 7 bit 0
Legend:
R = Readable bit PO = Program Once bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed ‘1’ = Bit is set ‘0’ = Bit is cleared
bit 23-8 Unimplemented: Read as ‘1’
bit 7 DSWDTEN: Deep Sleep Watchdog Timer Enable bit
1 = DSWDT is enabled
0 = DSWDT is disabled
bit 6 DSBOREN: Deep Sleep BOR Enable bit
1 = BOR is enabled in Deep Sleep
0 = BOR is disabled in Deep Sleep (does not affect Sleep mode)
bit 5 RTCOSC: RTCC Reference Clock Select bit
1 = RTCC uses SOSC as reference clock
0 = RTCC uses LPRC as reference clock
bit 4 DSWDTOSC: DSWDT Reference Clock Select bit
1 = DSWDT uses LPRC as reference clock
0 = DSWDT uses SOSC as reference clock
bit 3-0 DSWDTPS<3:0>: DSWDT Postscale select bits
The DSWDT prescaler is 32; this creates an approximate base time unit of 1 ms.
1111 = 1:2,147,483,648 (25.7 days)
1110 = 1:536,870,912 (6.4 days)
1101 = 1:134,217,728 (38.5 hours)
1100 = 1:33,554,432 (9.6 hours)
1011 = 1:8,388,608 (2.4 hours)
1010 = 1:2,097,152 (36 minutes)
1001 = 1:524,288 (9 minutes)
1000 = 1:131,072 (135 seconds)
0111 = 1:32,768 (34 seconds)
0110 = 1:8,192 (8.5 seconds)
0101 = 1:2,048 (2.1 seconds)
0100 = 1:512 (528 ms)
0011 = 1:128 (132 ms)
0010 = 1:32 (33 ms)
0001 = 1:8 (8.3 ms)
0000 = 1:2 (2.1 ms)