PIC18F2220 MICROCHIP [Microchip Technology], PIC18F2220 Datasheet - Page 240
PIC18F2220
Manufacturer Part Number
PIC18F2220
Description
28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2220.pdf
(388 pages)
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PIC18F2220/2320/4220/4320
REGISTER 23-1:
DS39599C-page 238
bit 7
bit 6
bit 5-4
bit 3-0
CONFIG1H: CONFIGURATION REGISTER 1 HIGH (BYTE ADDRESS 300001h)
IESO: Internal External Switch Over bit
1 = Internal External Switch Over mode enabled
0 = Internal External Switch Over mode disabled
FSCM: Fail-Safe Clock Monitor enable bit
1 = Fail-Safe Clock Monitor enabled
0 = Fail-Safe Clock Monitor disabled
Unimplemented: Read as ‘0’
F
11xx = External RC oscillator, CLKO function on RA6
1001 = Internal oscillator block, CLKO function on RA6 and port function on RA7
1000 = Internal oscillator block, port function on RA6 and port function on RA7
0111 = External RC oscillator, port function on RA6
0110 = HS oscillator, PLL enabled (clock frequency = 4 x F
0101 = EC oscillator, port function on RA6
0100 = EC oscillator, CLKO function on RA6
0010 = HS oscillator
0001 = XT oscillator
0000 = LP oscillator
Legend:
R = Readable bit
- n = Value when device is unprogrammed
bit 7
OSC
R/P-1
IESO
<3:0>: Oscillator Selection bits
FSCM
R/P-1
P = Programmable bit
U-0
—
U-0
—
F
R/P-1
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
OSC
3
OSC
F
R/P-1
OSC
1)
2003 Microchip Technology Inc.
2
F
R/P-1
OSC
1
F
R/P-1
OSC
bit 0
0
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