PIC18F4550-IP Datasheet, PDF (268/438 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

PIC18F2455/2550/4455/4550
REGISTER 21-2: ADCON1: A/D CONTROL REGISTER 1
U-0
—
bit 7
U-0
R/W-0
R/W-0
R/W-0⁽¹⁾
—
VCFG1
VCFG0
PCFG3
R/W⁽¹⁾
PCFG2
R/W⁽¹⁾
PCFG1
R/W⁽¹⁾
PCFG0
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 7-6
bit 5
bit 4
bit 3-0
Unimplemented: Read as ‘0’
VCFG1: Voltage Reference Configuration bit (VREF- source)
1 = VREF- (AN2)
0 = VSS
VCFG0: Voltage Reference Configuration bit (VREF+ source)
1 = VREF+ (AN3)
0 = VDD
PCFG3:PCFG0: A/D Port Configuration Control bits:
PCFG3:
PCFG0
0000^{(1) A}
A
A
A
A
A
A
A
A A AAA
0001 A A A A A A A A A A A A A
0010 A A A A A A A A A A A A A
0011 D A A A A A A A A A A A A
0100 D D A A A A A A A A A A A
0101 D D D A A A A A A A A A A
0110 D D D D A A A A A A A A A
0111^{(1) D D D D D A A A A A A A A}
1000 D D D D D D A A A A A A A
1001 D D D D D D D A A A A A A
1010 D D D D D D D D A A A A A
1011 D D D D D D D D D A A A A
1100 D D D D D D D D D D A A A
1101 D D D D D D D D D D D A A
1110 D D D D D D D D D D D D A
1111 D D D D D D D D D D D D D
A = Analog input
D = Digital I/O
Note 1: The POR value of the PCFG bits depends on the value of the PBADEN Configuration bit. When
PBADEN = 1, PCFG<3:0> = 0000; when PBADEN = 0, PCFG<3:0> = 0111.
2: AN5 through AN7 are available only on 40/44-pin devices.
DS39632E-page 266
© 2009 Microchip Technology Inc.