
PIC16C745/765
DS41124C-page 92
Preliminary
2000 Microchip Technology Inc.
REGISTER 12-1: A/D CONTROL REGISTER (ADCON0: 1Fh)
R/W-0
U-0
R/W-0
ADCS1 ADCS0
CHS2
CHS1
CHS0
GO/DONE
—
ADON
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR Reset
bit7
bit0
bit 7-6:
ADCS<1:0>: A/D Conversion Clock Select bits
00
= FINT/2
01
= FINT/8
10
= FINT/32(2)
11
= FRC (clock derived from dedicated internal oscillator)(2)
bit 5-3:
CHS<2:0>: Analog Channel Select bits
000
= channel 0, (RA0/AN0)
001
= channel 1, (RA1/AN1)
010
= channel 2, (RA2/AN2)
011
= channel 3, (RA3/AN3)
100
= channel 4, (RA5/AN4)
101
= channel 5, (RE0/AN5)(1)
110
= channel 6, (RE1/AN6)(1)
111
= channel 7, (RE2/AN7)(1)
bit 2:
GO/DONE: A/D Conversion Status bit
If ADON = 1
1
= A/D conversion in progress (setting this bit starts the A/D conversion)
0
= A/D conversion not in progress (This bit is automatically cleared by hardware when the A/D
conversion is complete)
bit 1:
Unimplemented: Read as '0'
bit 0:
ADON: A/D On bit
1
= A/D converter module is operating
0
= A/D converter module is shutoff and consumes no operating current
Note 1: A/D channels 5, 6 and 7 are implemented on the PIC16C765 only.
2: Choose FINT/32 or FRC to maintain 8-bit A/D accuracy at 24 MHz.
745cov.book Page 92 Wednesday, August 2, 2000 8:24 AM