Datasheet

© 2007-2012 Microchip Technology Inc. DS70291G-page 405
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
FIGURE 31-28: ADC CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS
(CHPS<1:0> = 01, SIMSAM = 0, ASAM = 0, SSRC<2:0> = 000)
FIGURE 31-29: ADC CONVERSION (10-BIT MODE) TIMING CHARACTERISTICS (CHPS<1:0> = 01,
SIMSAM = 0, ASAM = 1, SSRC<2:0> = 111, SAMC<4:0> = 00001)
AD55
TSAMP
Clear SAMPSet SAMP
AD61
ADCLK
Instruction
SAMP
AD60
DONE
AD1IF
1 2 3 4 5 6 8 5 6 7
1
– Software sets AD1CON. SAMP to start sampling.
2
– Sampling starts after discharge period. T
SAMP is described in
3
– Software clears AD1CON. SAMP to start conversion.
4
– Sampling ends, conversion sequence starts.
5
– Convert bit 9.
8
– One T
AD for end of conversion.
AD50
7
AD55
8
6
– Convert bit 8.
7
– Convert bit 0.
Execution
“dsPIC33F/PIC24H Family Reference Manual”.
Section 28. “10/12-bit ADC without DMA” (DS70210) in the
1 2 3 4 5 6 4 5 6 8
1
– Software sets AD1CON. ADON to start AD operation.
2
– Sampling starts after discharge period. T
SAMP is described in
3
– Convert bit 9.
4
– Convert bit 8.
5
– Convert bit 0.
7 3
6
– One T
AD for end of conversion.
7
– Begin conversion of next channel.
8
– Sample for time specified by SAMC<4:0>.
ADCLK
Instruction
Set ADON
Execution
SAMP
TSAMP
AD1IF
DONE
AD55 AD55
TSAMP
AD55
AD50
Section 28. “10/12-bit ADC without DMA” (DS70210) in the
“dsPIC33F/PIC24H Family Reference Manual”.