Datasheet

PIC17C7XX
DS30289C-page 180  1998-2013 Microchip Technology Inc.
REGISTER 16-2: ADCON1 REGISTER (ADDRESS 15h, BANK 5)
R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
ADCS1 ADCS0 ADFM — PCFG3 PCFG2 PCFG1 PCFG0
bit 7 bit 0
bit 7-6 ADCS1:ADCS0: A/D Conversion Clock Select bits
00 = F
OSC/8
01 = F
OSC/32
10 = F
OSC/64
11 = F
RC (clock derived from an internal RC oscillator)
bit 5 ADFM: A/D Result Format Select
1 = Right justified. 6 Most Significant bits of ADRESH are read as ’0’.
0 = Left justified. 6 Least Significant bits of ADRESL are read as ’0’.
bit 4 Unimplemented: Read as '0'
bit 3-1 PCFG3:PCFG1: A/D Port Configuration Control bits
bit 0 PCFG0: A/D Voltage Reference Select bit
1 = A/D reference is the V
REF+ and VREF- pins
0 = A/D reference is AV
DD and AVSS
Note: When this bit is set, ensure that the A/D voltage reference specifications are met.
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR Reset ’1’ = Bit is set ’0’ = Bit is cleared x = Bit is unknown
A = Analog input D = Digital I/O
PCFG3:PCFG0 AN15 AN14 AN13 AN12 AN11 AN10 AN9 AN8 AN7 AN6 AN5 AN4 AN3 AN2 AN1 AN0
000x
AAAAAAAAAAAAAAAA
001x
DAAAAAAADAAAAAAA
010x
DDAAAAAADDAAAAAA
011x
D D D A A AAADDDAAAAA
100x
DDDDAAAADDDDAAAA
101x
DDDDDAAADDDDDAAA
110x
DDDDDDAADDDDDDAA
111x
DDDDDDDDDDDDDDDD