PIC18F4321 Datasheet, PDF (230/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F4321 FAMILY
REGISTER 19-2:
ADCON1: A/D CONTROL REGISTER 1
U-0
U-0
R/W-0 R/W-0
—
—
VCFG1 VCFG0
bit 7
R/W-0⁽¹⁾
PCFG3
R/W⁽¹⁾
PCFG2
R/W⁽¹⁾
PCFG1
R/W⁽¹⁾
PCFG0
bit 0
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 A A A
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 con-
figuration 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.
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
DS39689E-page 228
Preliminary
© 2007 Microchip Technology Inc.