Datasheet

PIC32MX1XX/2XX
DS61168E-page 206 Preliminary  2011-2012 Microchip Technology Inc.
REGISTER 21-3: AD1CON3: ADC CONTROL REGISTER 3
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
23:16
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
15:8
R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADRC — — SAMC<4:0>
(1)
7:0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W R/W-0
ADCS<7:0>
(2)
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 31-16 Unimplemented: Read as ‘0’
bit 15 ADRC: ADC Conversion Clock Source bit
1 = Clock derived from FRC
0 = Clock derived from Peripheral Bus Clock (PBCLK)
bit 14-13 Unimplemented: Read as ‘0’
bit 12-8 SAMC<4:0>: Auto-Sample Time bits
(1)
11111 =31 TAD
•
•
•
00001 = 1 T
AD
00000 = 0 TAD (Not allowed)
bit 7-0 ADCS<7:0>: ADC Conversion Clock Select bits
(2)
11111111 =TPB • 2 • (ADCS<7:0> + 1) = 512 • TPB = TAD
•
•
•
00000001 =T
PB • 2 • (ADCS<7:0> + 1) = 4 • TPB = TAD
00000000 =TPB • 2 • (ADCS<7:0> + 1) = 2 • TPB = TAD
Note 1: This bit is only used if the SSRC<2:0> bits (AD1CON1<7:5>) = 111.
2: This bit is not used if the ADRC bit (AD1CON3<15>) = 1.