DSPIC33FJ128GP802-I/MM Microchip Technology, DSPIC33FJ128GP802-I/MM Datasheet - Page 287

• Manufacturer Part Number: DSPIC33FJ128GP802-I/MM
• Description: IC DSPIC MCU/DSP 128K 28QFN
• Manufacturer: Microchip Technology
• Series: dsPIC™ 33Fr

Specifications of DSPIC33FJ128GP802-I/MM

• Program Memory Type: FLASH
• Program Memory Size: 128KB (128K x 8)
• Package / Case: 28-QFN
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 40 MIPs
• Connectivity: CAN, I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: AC'97, Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 21
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 10x10b/12b, D/A 4x16b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Product: DSCs
• Data Bus Width: 16 bit
• Processor Series: DSPIC33F
• Core: dsPIC
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Data Ram Size: 16 KB
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DM240001, DV164033
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DV164033 - KIT START EXPLORER 16 MPLAB ICD2DM240001 - BOARD DEMO PIC24/DSPIC33/PIC32
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

25.0
The programmable CRC generator offers the following
features:
• User-programmable polynomial CRC equation
• Interrupt output
• Data FIFO
FIGURE 25-1:
 2009 Microchip Technology Inc.
dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
D
Note 1: This data sheet summarizes the features
PLEN<3:0>
OUT
XOR
2: Some registers and associated bits
PROGRAMMABLE CYCLIC
REDUNDANCY CHECK (CRC)
GENERATOR
of
dsPIC33FJ64GPX02/X04,
dsPIC33FJ128GPX02/X04 families of
devices. It is not intended to be a compre-
hensive reference source. To comple-
ment the information in this data sheet,
refer to “Section 36. Programmable
Cyclic Redundancy Check (CRC)”
(DS70298) of the “dsPIC33F/PIC24H
Family Reference Manual”, which is avail-
able
(www.microchip.com).
described in this section may not be avail-
able on all devices. Refer to Section 4.0
“Memory Organization” in this data
sheet for device-specific register and bit
information.
IN
p_clk
Hold
BIT 0
OUT
the
from
0
CRC SHIFTER DETAILS
the
dsPIC33FJ32GP302/304,
X1
0
1
Microchip
IN
p_clk
BIT 1
Hold
OUT
website
1
and
Preliminary
CRC Shift Register
X2
0
1
CRC Write Bus
25.1
The module implements a software configurable CRC
generator. The terms of the polynomial and its length
can be programmed using the CRCXOR (X<15:1>) bits
and the CRCCON (PLEN<3:0>) bits, respectively.
EQUATION 25-1:
To program this polynomial into the CRC generator,
the CRC register bits should be set as shown in
Table 25-1.
TABLE 25-1:
For the value of X<15:1>, the 12th bit and the 5th bit are
set to ‘1’, as required by the CRC equation. The 0th bit
required by the CRC equation is always XORed. For a
16-bit polynomial, the 16th bit is also always assumed
to be XORed; therefore, the X<15:1> bits do not have
the 0th bit or the 16th bit.
The topology of a standard CRC generator is shown in
Figure 25-2.
IN
p_clk
Hold
BIT 2
PLEN<3:0>
OUT
Bit Name
X<15:1>
2
Overview
CRC Read Bus
x
16
EXAMPLE CRC SETUP
X3
0
1
+
CRC EQUATION
x
12
X15
000100000010000
0
1
+
x
5
Bit Value
+
IN
BIT 15
1
1111
p_clk
Hold
DS70292D-page 287
OUT
15