PIC18F2331_07 Datasheet, PDF (248/400 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
REGISTER 20-1: ADCON0: A/D CONTROL REGISTER 0
U-0
—
bit 7
U-0
R/W-0
R/W-0
R/W-0
—
ACONV
ACSCH
ACMOD1
R/W-0
ACMOD0
R/W-0
GO/DONE
R/W-0
ADON
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
bit 4
bit 3-2
bit 1
bit 0
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
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
ACMOD: 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⁾
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
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, D refer to the ADCHS register.
DS39616C-page 246
Preliminary
© 2007 Microchip Technology Inc.