PIC24FJ256GB108-I Datasheet, PDF (125/352 Pages) Microchip Technology – 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)

PIC24FJ256GB110 FAMILY
REGISTER 8-2: CLKDIV: CLOCK DIVIDER REGISTER
R/W-0
ROI
bit 15
R/W-0
DOZE2
R/W-0
DOZE1
R/W-0
DOZE0
R/W-0
DOZEN⁽¹⁾
R/W-0
RCDIV2
R/W-0
RCDIV1
R/W-1
RCDIV0
bit 8
R/W-0
R/W-0
U-0
U-0
U-0
U-0
U-0
U-0
CPDIV1
CPDIV0
—
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
bit 14-12
bit 11
bit 10-8
bit 7-6
bit 5-0
ROI: Recover on Interrupt bit
1 = Interrupts clear the DOZEN bit and reset the CPU peripheral clock ratio to 1:1
0 = Interrupts have no effect on the DOZEN bit
DOZE<2:0>: CPU Peripheral Clock Ratio Select bits
111 = 1:128
110 = 1:64
101 = 1:32
100 = 1:16
011 = 1:8
010 = 1:4
001 = 1:2
000 = 1:1
DOZEN: DOZE Enable bit⁽¹⁾
1 = DOZE<2:0> bits specify the CPU peripheral clock ratio
0 = CPU peripheral clock ratio is set to 1:1
RCDIV<2:0>: FRC Postscaler Select bits
111 = 31.25 kHz (divide-by-256)
110 = 125 kHz (divide-by-64)
101 = 250 kHz (divide-by-32)
100 = 500 kHz (divide-by-16)
011 = 1 MHz (divide-by-8)
010 = 2 MHz (divide-by-4)
001 = 4 MHz (divide-by-2)
000 = 8 MHz (divide-by-1)
CPDIV<1:0>: USB System Clock Select bits (postscaler select from 32 MHz clock branch)
11 = 4 MHz (divide-by-8)⁽²⁾
10 = 8 MHz (divide-by-4)⁽²⁾
01 = 16 MHz (divide-by-2)
00 = 32 MHz (divide-by-1)
Unimplemented: Read as ‘0’
Note 1: This bit is automatically cleared when the ROI bit is set and an interrupt occurs.
2: This setting is not allowed while the USB module is enabled.
 2009 Microchip Technology Inc.
DS39897C-page 125