DSPIC33FJ128MC804-H/ML Microchip Technology, DSPIC33FJ128MC804-H/ML Datasheet - Page 273

• Manufacturer Part Number: DSPIC33FJ128MC804-H/ML
• Description: 16-bit DSC, 128KB Flash, Motor, CAN, DMA, 40 MIPS, NanoWatt 44 QFN 8x8x0.9mm TUB
• Manufacturer: Microchip Technology
• Series: dsPIC™ 33Fr

Specifications of DSPIC33FJ128MC804-H/ML

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: CAN, I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 9x10b/12b, D/A 6x16b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 140°C
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.0
The dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/
X04 and dsPIC33FJ128MCX02/X04 devices have up
to 9 ADC input channels.
The AD12B bit (AD1CON1<10>) allows each of the
ADC modules to be configured by the user as either a
10-bit, 4-sample and hold (S&H) ADC (default
configuration) or a 12-bit, 1-S&H ADC.
22.1
The 10-bit ADC configuration has the following key
features:
• Successive Approximation (SAR) conversion
• Conversion speeds of up to 1.1 Msps
• Up to nine 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
The 12-bit ADC configuration supports all the above
features, except:
• In the 12-bit configuration, conversion speeds of
• There is only one sample/hold amplifier in the
© 2011 Microchip Technology Inc.
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
Note:
pins
fractional/integer)
up to 500 ksps are supported
12-bit configuration, so simultaneous sampling of
multiple channels is not supported.
Note 1: This data sheet summarizes the features
2: Some registers and associated bits
10-BIT/12-BIT ANALOG-TO-
DIGITAL CONVERTER (ADC1)
Key Features
The ADC module needs to be disabled
before modifying the AD12B bit.
of
dsPIC33FJ64MCX02/X04
dsPIC33FJ128MCX02/X04
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to “Section 16. Analog-to-
Digital Converter (ADC)” (DS70183) of
the
Reference Manual”, which is available
from
(www.microchip.com).
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization”
this data sheet for device-specific register
and bit information.
the
the
“dsPIC33F/PIC24H
dsPIC33FJ32MC302/304,
Microchip
web
family
Family
and
site
of
in
Depending on the particular device pinout, the ADC
can have up to nine 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
depends on the specific device.
Block diagrams of the ADC module are shown in
Figure 22-1
22.2
The following configuration steps should be performed.
1.
2.
22.3
If more than one conversion result needs to be buffered
before triggering an interrupt, DMA data transfers can
be used. ADC1 can trigger a DMA data transfer. If
ADC1 is selected as the DMA IRQ source, a DMA
transfer occurs when the AD1IF bit gets set as a result
of an ADC1 sample conversion sequence.
The SMPI<3:0> bits (AD1CON2<5:2>) are used to
select how often the DMA RAM buffer pointer is
incremented.
The ADDMABM bit (AD1CON1<12>) determines how
the conversion results are filled in the DMA RAM buffer
area being used for ADC. If this bit is set, DMA buffers
are written in the order of conversion. The module
provides an address to the DMA channel that is the
same as the address used for the non-DMA stand-
alone buffer. If the ADDMABM bit is cleared, then DMA
buffers are written in Scatter/Gather mode. The module
provides a scatter/gather address to the DMA channel,
based on the index of the analog input and the size of
the DMA buffer.
Configure the ADC module:
a)
b)
c)
d)
e)
f)
g)
Configure ADC interrupt (if required):
a)
b)
ADC Initialization
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 desired data rate with processor
clock (AD1CON3<7:0>)
Determine how many S/H channels is used
(AD1CON2<9:8> and AD1PCFGH<15:0>
or AD1PCFGL<15:0>)
Select the appropriate sample/conversion
sequence
AD1CON3<12:8>)
Select
presented in the buffer (AD1CON1<9:8>)
Turn on ADC module (AD1CON1<15>)
Clear the AD1IF bit
Select ADC interrupt priority
ADC and DMA
and
Figure
port
how
range
22-2.
pins
(AD1CON1<7:5>
conversion
on
as
DS70291E-page 273
analog
analog
results
inputs
inputs
and
are