DSPIC30F2012 Microchip Technology Inc., DSPIC30F2012 Datasheet - Page 116

• Manufacturer Part Number: DSPIC30F2012
• Description: Dspic30f2011/2012/3012/3013 High-performance Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

dsPIC30F2011/2012/3012/3013
16.9
The module has 2 internal power modes.
When the ADON bit is ‘1’, the module is in Active mode;
it is fully powered and functional.
When ADON is ‘0’, the module is in Off mode. The dig-
ital and analog portions of the circuit are disabled for
maximum current savings.
In order to return to the Active mode from Off mode, the
user must wait for the ADC circuitry to stabilize.
16.10 A/D Operation During CPU Sleep
16.10.1
When the device enters Sleep mode, all clock sources
to the module are shut down and stay at logic ‘0’.
If Sleep occurs in the middle of a conversion, the con-
version is aborted. The converter will not continue with
a partially completed conversion on exit from Sleep
mode.
Register contents are not affected by the device
entering or leaving Sleep mode.
The ADC module can operate during Sleep mode if the
A/D clock source is set to RC (ADRC = 1). When the RC
clock source is selected, the ADC module waits one
instruction cycle before starting the conversion. This
allows the SLEEP instruction to be executed which elim-
FIGURE 16-4:
DS70139E-page 114
RAM Contents:
Read to Bus:
Module Power-Down Modes
and Idle Modes
Signed Fractional
A/D OPERATION DURING CPU
SLEEP MODE
Signed Integer
Fractional
Integer
A/D OUTPUT DATA FORMATS
d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
d11 d11 d11 d11 d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
0
0
0
0
d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
inates all digital switching noise from the conversion.
When the conversion is complete, the CONV bit will be
cleared and the result loaded into the ADCBUF register.
If the A/D interrupt is enabled, the device will wake-up
from Sleep. If the A/D interrupt is not enabled, the ADC
module will then be turned off, although the ADON bit
will remain set.
16.10.2
The ADSIDL bit selects if the module will stop on Idle or
continue on Idle. If ADSIDL = 0, the module will con-
tinue operation on assertion of Idle mode. If ADSIDL =
1, the module will stop on Idle.
16.11 Effects of a Reset
A device Reset forces all registers to their Reset state.
This forces the ADC module to be turned off, and any
conversion and sampling sequence is aborted. The val-
ues that are in the ADCBUF registers are not modified.
The A/D Result register will contain unknown data after
a Power-on Reset.
16.12 Output Formats
The A/D result is 12 bits wide. The data buffer RAM is
also 12 bits wide. The 12-bit data can be read in one of
four different formats. The FORM<1:0> bits select the
format. Each of the output formats translates to a 16-bit
result on the data bus.
A/D OPERATION DURING CPU IDLE
MODE
© 2006 Microchip Technology Inc.
0
0
0
0
0
0
0
0