Microchip Technology MA330027 Data Sheet
2009-2012 Microchip Technology Inc.
DS70616G-page 423
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
REGISTER 23-4:
ADxCON3: ADCx CONTROL REGISTER 3
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>
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
ADCS<7:0>
(
bit 7
bit 0
Legend:
R = Readable bit
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: ADC Conversion Clock Source bit
1 = ADC internal RC clock
0 = Clock Derived From System Clock
1 = ADC internal RC clock
0 = Clock Derived From System Clock
bit 14-13
Unimplemented: Read as ‘0’
bit 12-8
SAMC<4:0>: Auto-Sample Time bits
)
11111 = 31 T
AD
•
•
•
00001 = 1 T
•
•
00001 = 1 T
AD
00000 = 0 T
AD
bit 7-0
ADCS<7:0>: ADC Conversion Clock Select bits
)
11111111 = T
P
• (ADCS<7:0> + 1) = 256 • T
CY
= T
AD
•
•
•
00000010 = T
•
•
00000010 = T
P
• (ADCS<7:0> + 1) = 3 • T
CY
= T
AD
00000001 = T
P
• (ADCS<7:0> + 1) = 2 • T
CY
= T
AD
00000000 = T
P
• (ADCS<7:0> + 1) = 1 • T
CY
= T
AD
Note 1: This bit is only used if ADxCON1<7:5> (SSRC<2:0>) = 111 and ADxCON1<4> (SSRCG) = 0.
2: This bit is not used if ADxCON3<15> (ADRC) = 1.
3: T
3: T
P
= 1/F
P
.