DSPIC33FJ32GP302-I/SO Microchip Technology, DSPIC33FJ32GP302-I/SO Datasheet - Page 49
![IC DSPIC MCU/DSP 32K 28SOIC](/photos/6/59/65909/150-28-soic_sml.jpg)
DSPIC33FJ32GP302-I/SO
Manufacturer Part Number
DSPIC33FJ32GP302-I/SO
Description
IC DSPIC MCU/DSP 32K 28SOIC
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr
Datasheets
1.DSPIC33FJ32GP204-IPT.pdf
(14 pages)
2.DSPIC33FJ32GP302-ISO.pdf
(412 pages)
3.DSPIC33FJ64GP804-IML.pdf
(402 pages)
4.DSPIC33FJ32GP204-IPT.pdf
(270 pages)
Specifications of DSPIC33FJ32GP302-I/SO
Program Memory Type
FLASH
Program Memory Size
32KB (32K x 8)
Package / Case
28-SOIC (7.5mm Width)
Core Processor
dsPIC
Core Size
16-Bit
Speed
40 MIPs
Connectivity
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
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 10x10b/12b
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
4 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
Package
28SOIC W
Device Core
dsPIC
Family Name
dsPIC33
Maximum Speed
40 MHz
Operating Supply Voltage
3.3 V
Interface Type
I2C/SPI/UART
On-chip Adc
10-chx10-bit|10-chx12-bit
Number Of Timers
3
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
- DSPIC33FJ32GP204-IPT PDF datasheet
- DSPIC33FJ32GP302-ISO PDF datasheet #2
- DSPIC33FJ64GP804-IML PDF datasheet #3
- DSPIC33FJ32GP204-IPT PDF datasheet #4
- Current page: 49 of 270
- Download datasheet (2Mb)
4.4
Modulo Addressing mode is a method of providing an
automated means to support circular data buffers using
hardware. The objective is to remove the need for
software to perform data address boundary checks
when executing tightly looped code, as is typical in
many DSP algorithms.
Modulo Addressing can operate in either data or program
space (since the data pointer mechanism is essentially
the same for both). One circular buffer can be supported
in each of the X (which also provides the pointers into
program space) and Y data spaces. Modulo Addressing
can operate on any W register pointer. However, it is not
advisable to use W14 or W15 for Modulo Addressing
since these two registers are used as the Stack Frame
Pointer and Stack Pointer, respectively.
In general, any particular circular buffer can be
configured to operate in only one direction, as there are
certain restrictions on the buffer start address (for incre-
menting buffers), or end address (for decrementing
buffers), based upon the direction of the buffer.
The only exception to the usage restrictions is for
buffers that have a power-of-two length. As these
buffers satisfy the start and end address criteria, they
can operate in a bidirectional mode (that is, address
boundary checks are performed on both the lower and
upper address boundaries).
4.4.1
The Modulo Addressing scheme requires that a
starting and ending address be specified and loaded
into the 16-bit Modulo Buffer Address registers:
XMODSRT, XMODEND, YMODSRT and YMODEND
(see Table 4-1).
FIGURE 4-5:
2009 Microchip Technology Inc.
Address
0x1100
0x1163
Byte
Modulo Addressing
START AND END ADDRESS
dsPIC33FJ32GP202/204 and dsPIC33FJ16GP304
Start Addr = 0x1100
End Addr = 0x1163
Length = 0x0032 words
MODULO ADDRESSING OPERATION EXAMPLE
MOV
MOV
MOV
MOV
MOV
MOV
MOV
MOV
DO
MOV
AGAIN: INC
Preliminary
#0x1100, W0
W0, XMODSRT
#0x1163, W0
W0, MODEND
#0x8001, W0
W0, MODCON
#0x0000, W0
#0x1110, W1
AGAIN, #0x31
W0, [W1++]
W0, W0
The length of a circular buffer is not directly specified. It
is
corresponding start and end addresses. The maximum
possible length of the circular buffer is 32K words
(64 Kbytes).
4.4.2
The Modulo and Bit-Reversed Addressing Control
register, MODCON<15:0>, contains enable flags as well
as a W register field to specify the W Address registers.
The XWM and YWM fields select the registers that will
operate with Modulo Addressing:
• If XWM = 15, X RAGU and X WAGU Modulo
• If YWM = 15, Y AGU Modulo Addressing is
The X Address Space Pointer W register (XWM), to
which Modulo Addressing is to be applied, is stored in
MODCON<3:0> (see Table 4-1). Modulo Addressing is
enabled for X data space when XWM is set to any value
other than ‘15’ and the XMODEN bit is set at
MODCON<15>.
The Y Address Space Pointer W register (YWM) to
which Modulo Addressing is to be applied is stored in
MODCON<7:4>. Modulo Addressing is enabled for Y
data space when YWM is set to any value other than
‘15’ and the YMODEN bit is set at MODCON<14>.
Note:
Addressing is disabled.
disabled.
determined by the difference
;set modulo start address
;set modulo end address
;enable W1, X AGU for modulo
;W0 holds buffer fill value
;point W1 to buffer
;fill the 50 buffer locations
;fill the next location
;increment the fill value
Y
calculations assume word sized data (LSB
of every EA is always clear).
W ADDRESS REGISTER
SELECTION
space
Modulo
Addressing
DS70290F-page 49
between
EA
the
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