DSPIC30F3011-30I/PT Microchip Technology, DSPIC30F3011-30I/PT Datasheet - Page 24

• Manufacturer Part Number: DSPIC30F3011-30I/PT
• Description: IC DSPIC MCU/DSP 24K 44TQFP
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F3011-30I/PT

• Program Memory Type: FLASH
• Program Memory Size: 24KB (8K x 24)
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 30 MIPs
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 30
• Eeprom Size: 1K x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Product: DSCs
• Data Bus Width: 16 bit
• Processor Series: DSPIC30F
• Core: dsPIC
• Maximum Clock Frequency: 30 MHz
• Data Ram Size: 1024 B
• 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, ICE4000, DM240002, DM330011, DM300018
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC30F006 - MODULE SKT FOR DSPIC30F 44TQFPAC164305 - MODULE SKT FOR PM3 44TQFPDV164005 - KIT ICD2 SIMPLE SUIT W/USB CABLE
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: DSPIC30F301130IPT

dsPIC30F3010/3011
2.4.1
The 17x17-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 17x17-bit
multiplier/scaler is a 33-bit value, which is sign-
extended to 40 bits. Integer data is inherently
represented as a signed two’s complement value,
where the MSB is defined as a sign bit. Generally
speaking, the range of an N-bit two’s complement
integer is -2
range is -32768 (0x8000) to 32767 (0x7FFF), including
0. For a 32-bit integer, the data range is -2,147,483,648
(0x8000 0000) to 2,147,483,645 (0x7FFF FFFF).
When the multiplier is configured for fractional multipli-
cation, 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
For a 16-bit fraction, the Q15 data range is -1.0
(0x8000) to 0.999969482 (0x7FFF), including 0 and
has a precision of 3.01518x10
16x16 multiply operation generates a 1.31 product,
which has a precision of 4.65661x10
The same multiplier is used to support the MCU
multiply instructions, which includes 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.
2.4.2
The data accumulator consists of a 40-bit adder/sub-
tracter with automatic sign extension logic. It can select
one of two accumulators (A or B) as its pre-
accumulation source and post-accumulation destina-
tion. For the ADD and LAC instructions, the data to be
accumulated or loaded can be optionally scaled via the
barrel shifter, prior to accumulation.
DS70141F-page 24
N-1
MULTIPLIER
DATA ACCUMULATORS AND
ADDER/SUBTRACTER
to 2
N-1
– 1. For a 16-bit integer, the data
-5
. In Fractional mode, a
-10
.
1-N
).
2.4.2.1
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 SATA/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
warning trap when set and the corresponding overflow
trap flag enable bit (OVATE, OVBTE) in the INTCON1
register (refer to
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
Adder/Subtracter, Overflow and
Saturation
Section 5.0
© 2010 Microchip Technology Inc.
“Interrupts”) is set. This