PIC18F2331 MICROCHIP [Microchip Technology], PIC18F2331 Datasheet - Page 247

• Manufacturer Part Number: PIC18F2331
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

REGISTER 20-2:
 2003 Microchip Technology Inc.
bit 7-6 VCFG<1:0>: A/D V
bit 5
bit 4
bit 3
bit 2
bit 1-0 ADPNT<1:0>: Buffer Read Pointer Locations bits
00 =V
01 =V
10 =V
11 =V
Unimplemented: Read as ‘0’
FIFOEN: FIFO Buffer Enable bit
1 = FIFO is enabled
0 = FIFO is disabled
BFEMT: Buffer Empty bit
1 = FIFO is empty
0 = FIFO is not empty (at least one of four locations has unread A/D result data)
BFOVFL: Buffer Overflow bit
1 = A/D result has overwritten a buffer location that has unread data
0 = A/D result has not overflowed
Designates the location to be read next.
00 = Buffer address 0
01 = Buffer address 1
10 = Buffer address 2
11 = Buffer address 3
bit 7
Legend:
R = Readable bit
-n = Value at Reset
VCFG1
ADCON1: A/D CONTROL REGISTER 1
R/W-0
REF
REF
REF
REF
+ = AV
+ = External V
+ = AV
+ = External V
VCFG0
R/W-0
DD
DD
, V
, V
REF
REF
REF
+ and A/D V
REF
REF
PIC18F2331/2431/4331/4431
- = AV
- = External V
+, V
-, V
U-0
—
W = Writable bit
‘1’ = bit is set
Preliminary
REF
SS
REF
, (AN2 and AN3 are Analog inputs or Digital I/O)
- = External V
REF
- = AV
FIFOEN
R/W-0
- Source Selection bits
REF
SS
-, (AN3 is an Analog input or Digital I/O)
, (AN2 is an Analog input or Digital I/O)
REF
BFEMT
U = Unimplemented bit, read as ‘0’
‘0’ = bit is cleared
-
R-0
BFOVFL
R-0
ADPNT1
x = bit is unknown
R-0
DS39616B-page 245
ADPNT0
R-0
bit 0