Microchip Technology MA330028 Data Sheet
2011-2013 Microchip Technology Inc.
DS70000657H-page 329
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
REGISTER 23-3:
AD1CON3: ADC1 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
—
—
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
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:
ADC1 Conversion Clock Source bit
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
•
•
00001
= 1 T
AD
00000
= 0 T
AD
bit 7-0
ADCS<7:0>:
ADC1 Conversion Clock Select bits
11111111
= T
P
• (ADCS<7:0> + 1) = T
P
•256 = T
AD
•
•
•
00000010
•
•
00000010
= T
P
• (ADCS<7:0> + 1) = T
P
•3 = T
AD
00000001
= T
P
• (ADCS<7:0> + 1) = T
P
•2 = T
AD
00000000
= T
P
• (ADCS<7:0> + 1) = T
P
•1 = T
AD
Note 1:
This bit is only used if SSRC<2:0> (AD1CON1<7:5>) = 111 and SSRCG (AD1CON1<4>) = 0.
2:
This bit is not used if ADRC (AD1CON3<15>) = 1.