Datasheet

 2012 Microchip Technology Inc. DS30575A-page 557
PIC18F97J94 FAMILY
REGISTER 28-4: CONFIG2H: CONFIGURATION REGISTER 2 HIGH (BYTE ADDRESS 300003h)
(1,2)
U-1 U-1 U-1 U-1 R/WO-1 R/WO-1 R/WO-1 R/WO-1
— — — — PLLDIV3
(3)
PLLDIV2
(3)
PLLDIV1
(3)
PLLDIV0
(3)
bit 7 bit 0
Legend: P = Programmable bit WO = Write-Once 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 7-4 Unimplemented: Program the corresponding Flash Configuration bit to ‘1’
bit 3-0 PLLDIV<3:0>: Frequency Multiplier Select bits
(3)
Divider must be selected so as to not exceed 64 MHz output.
1111 = No PLL used; PLLEN bit is not available to user
1110 = 8x PLL is selected
1101 = 6x PLL is selected
1100 = 4x PLL is selected
1011 = Reserved; do not use
1010 = Reserved; do not use
1001 = Reserved; do not use
1000 = Reserved; do not use
0111 = 96 MHz PLL is selected; oscillator divided by 12 (48 MHz input)
0110 = 96 MHz PLL is selected; oscillator divided by 10 (40 MHz input)
0101 = 96 MHz PLL is selected; oscillator divided by 6 (24 MHz input)
0100 = 96 MHz PLL is selected; oscillator divided by 5 (20 MHz input)
0011 = 96 MHz PLL is selected; oscillator divided by 4 (16 MHz input)
0010 = 96 MHz PLL is selected; oscillator divided by 3 (12 MHz input)
0001 = 96 MHz PLL is selected; oscillator divided by 2 (8 MHz input)
0000 = 96 MHz PLL is selected; no divide – oscillator is used directly (4 MHz input)
Note 1: The CONFIG2H bits can only be programmed indirectly by programming the Flash Configuration Word.
2: The CONFIG2H is reset to ‘1’ only on V
DD Reset; it is reloaded with the programmed value at any device
Reset.
3: If USB functionality is used, then this field must be set to ‘0xxx’ (i.e., 96 MHz PLL is selected).