Datasheet

 2012 Microchip Technology Inc. DS30575A-page 445
PIC18F97J94 FAMILY
REGISTER 22-8: ADCON3H: A/D CONTROL REGISTER 3 HIGH
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 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 7 ADRC: A/D Conversion Clock Source bit
1 = RC Clock
0 = Clock derived from system clock
bit 6 EXTSAM: Extended Sampling Time bit
1 = A/D is still sampling after SAMP = 0
0 = A/D is finished sampling
bit 5 PUMPEN: Charge Pump Enable bit
1 = Charge pump for switches is enabled
0 = Charge pump for switches is disabled
bit 4-0 SAMC<4:0>: Auto-Sample Time Select bits
11111 = 31 T
AD

00001 =1 T
AD
00000 = 0 TAD
REGISTER 22-9: ADCON3L: A/D CONTROL REGISTER 3 LOW
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 7-0 ADCS<7:0>: A/D Conversion Clock Select bits ((ADCS<7:0> + 1) T
CY) = TAD
11111111
 = Reserved
01000000
00111111 = 64·T
CY =TAD

00000001 = 2·T
CY =TAD
00000000 = TCY =TAD