PIC18F2331/2431/4331/4431
REGISTER 21-1: ADCON0: A/D CONTROL REGISTER 0
U-0
—
U-0
—
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ADON
ACONV
ACSCH
ACMOD1
ACMOD0
GO/DONE
bit 7
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
Unimplemented: Read as ‘0’
ACONV: Auto-Conversion Continuous Loop or Single-Shot Mode Select bit
1= Continuous Loop mode enabled
0= Single-Shot mode enabled
bit 4
ACSCH: Auto-Conversion Single or Multi-Channel Mode bit
1= Multi-Channel mode enabled, Single Channel mode disabled
0= Single Channel mode enabled, Multi-Channel mode disabled
bit 3-2
ACMOD<1:0>: Auto-Conversion Mode Sequence Select bits
If ACSCH = 1:
00= Sequential Mode 1 (SEQM1); two samples are taken in sequence:
1st sample: Group A(1)
2nd sample: Group B(1)
01= Sequential Mode 2 (SEQM2); four samples are taken in sequence:
1st sample: Group A(1)
2nd sample: Group B(1)
3rd sample: Group C(1)
4th sample: Group D(1)
10= Simultaneous Mode 1 (STNM1); two samples are taken simultaneously:
1st sample: Group A and Group B(1)
11= Simultaneous Mode 2 (STNM2); two samples are taken simultaneously:
1st sample: Group A and Group B(1)
2nd sample: Group C and Group D(1)
If ACSCH = 0, Auto-Conversion Single Channel Sequence Mode Enabled:
00= Single Channel Mode 1 (SCM1); Group A is taken and converted(1)
01= Single Channel Mode 2 (SCM2); Group B is taken and converted(1)
10= Single Channel Mode 3 (SCM3); Group C is taken and converted(1)
11= Single Channel Mode 4 (SCM4); Group D is taken and converted(1)
bit 1
GO/DONE: A/D Conversion Status bit
1= A/D conversion cycle in progress. Setting this bit starts the A/D conversion cycle. If Auto-
Conversion Single-Shot mode is enabled (ACONV = 0), this bit is automatically cleared by
hardware when the A/D conversion (single or multi-channel depending on ACMOD settings) has
completed. If Auto-Conversion Continuous Loop mode is enabled (ACONV = 1), this bit remains
set after the user/trigger has set it (continuous conversions). It may be cleared manually by the user
to stop the conversions.
0= A/D conversion or multiple conversions completed/not in progress
bit 0
ADON: A/D On bit
1= A/D Converter module is enabled (after brief power-up delay, starts continuous sampling)
0= A/D Converter module is disabled
Note 1: Groups A, B, C, and D refer to the ADCHS register.
DS39616D-page 240
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
