DSPIC33FJ128GP708-E/PT Microchip Technology, DSPIC33FJ128GP708-E/PT Datasheet - Page 31
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DSPIC33FJ128GP708-E/PT
Manufacturer Part Number
DSPIC33FJ128GP708-E/PT
Description
IC DSPIC MCU/DSP 128K 80TQFP
Manufacturer
Microchip Technology
Series
dsPIC™ 33Fr
Datasheets
1.DSPIC33FJ12GP201-ISO.pdf
(90 pages)
2.DSPIC33FJ64GP206-IPT.pdf
(322 pages)
3.DSPIC33FJ64GP206-IPT.pdf
(28 pages)
Specifications of DSPIC33FJ128GP708-E/PT
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
69
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 24x10b/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
80-TFQFP
For Use With
DM300024 - KIT DEMO DSPICDEM 1.1DV164033 - KIT START EXPLORER 16 MPLAB ICD2MA330012 - MODULE DSPIC33 100P TO 84QFPMA330011 - MODULE DSPIC33 100P TO 100QFPDM300019 - BOARD DEMO DSPICDEM 80L STARTERDM240001 - BOARD DEMO PIC24/DSPIC33/PIC32AC164328 - MODULE SKT FOR 80TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
- DSPIC33FJ12GP201-ISO PDF datasheet
- DSPIC33FJ64GP206-IPT PDF datasheet #2
- DSPIC33FJ64GP206-IPT PDF datasheet #3
- Current page: 31 of 322
- Download datasheet (5Mb)
3.6.1
The 17-bit x 17-bit multiplier is capable of signed or
unsigned operation and can multiplex its output using a
scaler to support either 1.31 fractional (Q31) or 32-bit
integer results. Unsigned operands are zero-extended
into the 17th bit of the multiplier input value. Signed
operands are sign-extended into the 17th bit of the
multiplier input value. The output of the 17-bit x 17-bit
multiplier/scaler
sign-extended to 40 bits. Integer data is inherently
represented as a signed two’s complement value,
where the Most Significant bit (MSb) is defined as a
sign bit. Generally speaking, the range of an N-bit two’s
complement integer is -2
integer, the data range is -32768 (0x8000) to 32767
(0x7FFF) including 0. For a 32-bit integer, the data
range
2,147,483,647 (0x7FFF FFFF).
When the multiplier is configured for fractional
multiplication, the data is represented as a two’s
complement fraction, where the MSb is defined as a
sign bit and the radix point is implied to lie just after the
sign bit (QX format). The range of an N-bit two’s
complement fraction with this implied radix point is -1.0
to (1 - 2
-1.0 (0x8000) to 0.999969482 (0x7FFF) including 0
and has a precision of 3.01518x10
mode, the 16 x 16 multiply operation generates a 1.31
product which has a precision of 4.65661 x 10
The same multiplier is used to support the MCU
multiply instructions which include integer 16-bit
signed, unsigned and mixed sign multiplies.
The MUL instruction may be directed to use byte or
word sized operands. Byte operands will direct a 16-bit
result, and word operands will direct a 32-bit result to
the specified register(s) in the W array.
3.6.2
The
adder/subtracter with automatic sign extension logic. It
can select one of two accumulators (A or B) as its
pre-accumulation
destination. For the ADD and LAC instructions, the data
to be accumulated or loaded can be optionally scaled
via the barrel shifter prior to accumulation.
© 2009 Microchip Technology Inc.
data
1-N
is
). For a 16-bit fraction, the Q15 data range is
MULTIPLIER
DATA ACCUMULATORS AND
ADDER/SUBTRACTER
accumulator
-2,147,483,648
is
source
a
N-1
33-bit
consists
and
to 2
N-1
(0x8000 0000)
value
post-accumulation
- 1. For a 16-bit
dsPIC33FJXXXGPX06/X08/X10
-5
. In Fractional
of
which
a
-10
.
40-bit
to
is
3.6.2.1
The adder/subtracter is a 40-bit adder with an optional
zero input into one side, and either true, or complement
data into the other input. In the case of addition, the
Carry/Borrow input is active-high and the other input is
true data (not complemented), whereas in the case of
subtraction, the Carry/Borrow input is active-low and
the other input is complemented. The adder/subtracter
generates Overflow Status bits, SA/SB and OA/OB,
which are latched and reflected in the STATUS
register:
• Overflow from bit 39: this is a catastrophic
• Overflow into guard bits 32 through 39: this is a
The adder has an additional saturation block which
controls accumulator data saturation, if selected. It
uses the result of the adder, the Overflow Status bits
described above and the SAT<A:B> (CORCON<7:6>)
and ACCSAT (CORCON<4>) mode control bits to
determine when and to what value to saturate.
Six STATUS register bits have been provided to
support saturation and overflow; they are:
1.
2.
3.
4.
5.
6.
The OA and OB bits are modified each time data
passes through the adder/subtracter. When set, they
indicate that the most recent operation has overflowed
into the accumulator guard bits (bits 32 through 39).
The OA and OB bits can also optionally generate an
arithmetic
corresponding Overflow Trap Flag Enable bits (OVATE,
OVBTE) in the INTCON1 register (refer to Section 7.0
“Interrupt Controller”) are set. This allows the user to
take immediate action, for example, to correct system
gain.
overflow in which the sign of the accumulator is
destroyed.
recoverable overflow. This bit is set whenever all
the guard bits are not identical to each other.
OA:
AccA overflowed into guard bits
OB:
AccB overflowed into guard bits
SA:
AccA saturated (bit 31 overflow and saturation)
or
AccA overflowed into guard bits and saturated
(bit 39 overflow and saturation)
SB:
AccB saturated (bit 31 overflow and saturation)
or
AccB overflowed into guard bits and saturated
(bit 39 overflow and saturation)
OAB:
Logical OR of OA and OB
SAB:
Logical OR of SA and SB
warning
Adder/Subtracter, Overflow and
Saturation
trap
when
DS70286C-page 29
set
and
the
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