Datasheet

 2010-2011 Microchip Technology Inc. DS39996F-page 303
PIC24FJ128GA310 FAMILY
bit 1 BUFM: Buffer Fill Mode Select bit
(1)
1 = A/D buffer is two, 13-word buffers, starting at ADC1BUF0 and ADC1BUF12, and sequential
conversions fill the buffers alternately (Split mode)
0 = A/D buffer is a single, 26-word buffer and fills sequentially from ADC1BUF0 (FIFO mode)
bit 0 ALTS: Alternate Input Sample Mode Select bit
1 = Uses channel input selects for Sample A on first sample and Sample B on next sample
0 = Always uses channel input selects for Sample A
REGISTER 24-2: AD1CON2: A/D CONTROL REGISTER 2 (CONTINUED)
Note 1: These bits are only applicable when the buffer is used in FIFO mode (BUFREGEN = 0). In addition, BUFS
is only used when BUFM = 1.
REGISTER 24-3: AD1CON3: A/D CONTROL REGISTER 3
R/W-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADRC EXTSAM PUMPEN SAMC4 SAMC3 SAMC2 SAMC1 SAMC0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ADRC: A/D Conversion Clock Source bit
1 = RC Clock
0 = Clock derived from system clock
bit 14 EXTSAM: Extended Sampling Time bit
1 = A/D is still sampling after SAMP = 0
0 = A/D is finished sampling
bit 13 PUMPEN: Charge Pump Enable bit
1 = Charge pump for switches is enabled
0 = Charge pump for switches is disabled
bit 12-8 SAMC<4:0>: Auto-Sample Time Select bits
11111 = 31 T
AD

00001 =1 T
AD
00000 = 0 TAD
bit 7-0 ADCS<7:0>: A/D Conversion Clock Select bits
11111111
 = Reserved
01000000
00111111 = 64·T
CY =TAD

00000001 = 2·T
CY =TAD
00000000 = TCY =TAD