DSPIC33FJ32MC204-I/PT Microchip Technology Inc., DSPIC33FJ32MC204-I/PT Datasheet - Page 205
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DSPIC33FJ32MC204-I/PT
Manufacturer Part Number
DSPIC33FJ32MC204-I/PT
Description
16-BIT DSC, 44LD, 32KB FLASH, MOTOR, 40 MIPS, NANOWATT
Manufacturer
Microchip Technology Inc.
Type
DSPr
Datasheet
1.DSPIC33FJ32MC204-IPT.pdf
(292 pages)
Specifications of DSPIC33FJ32MC204-I/PT
A/d Inputs
9-Channels, 10-Bit
Cpu Speed
40 MIPS
Eeprom Memory
0 Bytes
Input Output
35
Interface
I2C, SPI, UART/USART
Ios
35
Memory Type
Flash
Number Of Bits
16
Package Type
44-pin TQFP
Programmable Memory
32K Bytes
Ram Size
2K Bytes
Timers
3-16-bit, 1-32-bit
Voltage, Range
3-3.6 V
Dc
08+
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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19.0
The
dsPIC33FJ16MC304 devices have up to 9 Analog-to-
Digital Converter (ADC) module input channels.
The AD12B bit (AD1CON1<10>) allows each of the
ADC modules to be configured as either a 10-bit, 4
sample-and-hold ADC (default configuration), or a
12-bit, 1 sample-and-hold ADC.
19.1
The 10-bit ADC configuration has the following key
features:
• Successive Approximation (SAR) conversion
• Conversion speeds of up to 1.1 Msps
• Up to 9 analog input pins
• External voltage reference input pins
• Simultaneous sampling of up to four analog input
• Automatic Channel Scan mode
• Selectable conversion trigger source
• Selectable Buffer Fill modes
• Four result alignment options (signed/unsigned,
• Operation during CPU Sleep and Idle modes
• 16-word conversion result buffer
The 12-bit ADC configuration supports all the above
features, except:
• In the 12-bit configuration, conversion speeds of
• There is only 1 sample-and-hold amplifier in the
© 2007 Microchip Technology Inc.
Note:
Note:
pins
fractional/integer)
up to 500 ksps are supported
12-bit configuration, so simultaneous sampling of
multiple channels is not supported.
10-BIT/12-BIT ANALOG-TO-
DIGITAL CONVERTER (ADC)
Key Features
This data sheet summarizes the features
of
dsPIC33FJ16MC304 devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “dsPIC33F
Family Reference Manual”. Please see
the Microchip web site (www.micro-
chip.com) for the latest dsPIC33F Family
Reference Manual sections.
The ADC module must be disabled before
the AD12B bit can be modified.
dsPIC33FJ32MC202/204
the
dsPIC33FJ32MC202/204
and
and
Preliminary
Depending on the particular device pinout, the ADC
can have up to 9 analog input pins, designated AN0
through AN8. In addition, there are two analog input
pins for external voltage reference connections. These
voltage reference inputs can be shared with other
analog input pins.
The actual number of analog input pins and external
voltage reference input configuration will depend on the
specific device. Refer to the device data sheet for
further details.
A block diagram of the ADC is shown in Figure 19-1.
19.2
To configure the ADC module:
1.
2.
3.
4.
5.
6.
7.
8.
Select
(AD1PCFGH<15:0> or AD1PCFGL<15:0>).
Select voltage reference source to match
expected
(AD1CON2<15:13>).
Select the analog conversion clock to match the
desired data rate with the processor clock
(AD1CON3<5:0>).
Determine how many sample-and-hold chan-
nels will be used (AD1CON2<9:8> and
AD1PCFGH<15:0> or AD1PCFGL<15:0>).
Select
sequence
AD1CON3<12:8>).
Select the way conversion results are presented
in the buffer (AD1CON1<9:8>).
Turn on the ADC module (AD1CON1<15>).
Configure ADC interrupt (if required):
a)
b)
ADC Initialization
Clear the AD1IF bit.
Select the ADC interrupt priority.
the
port
range
appropriate
pins
(AD1CON1<7:5>
on
as
sample/conversion
analog
DS70283B-page 203
analog
inputs
inputs
and
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