DSPIC33FJ128GP706-I/PT Microchip Technology, DSPIC33FJ128GP706-I/PT Datasheet - Page 76

• Manufacturer Part Number: DSPIC33FJ128GP706-I/PT
• Description: IC DSPIC MCU/DSP 128K 64TQFP
• Manufacturer: Microchip Technology
• Series: dsPIC™ 33Fr

Specifications of DSPIC33FJ128GP706-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 128KB (128K x 8)
• Package / Case: 64-TFQFP
• 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: 53
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 18x10b/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: 85
• Data Ram Size: 16 KB
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Data Rom Size: 4096 B
• 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: 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/PIC32AC164327 - MODULE SKT FOR 64TQFPDV164005 - KIT ICD2 SIMPLE SUIT W/USB CABLE
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP3909 / dsPIC33F 3-Phase Energy Meter Reference Design
DS51723A-page 76
FIGURE C-1:
C.2.1
Assuming that the average of a periodic signal in one cycle is g(t),
EQUATION C-1:
Make t = x/
EQUATION C-2:
where f(x) = g(x/
If the entire period sampling cannot be realized while a sampling frequency deviation
Δ exists, then:
EQUATION C-3:
We have:
EQUATION C-4:
The value of F
non--synchronous sampling error E = f(x)- F
As F
within the range of 0-2
1
(α) is function with 2
Basic Idea of Quasi-Synchronous Sampling
ω
, then,
1
(α) is a function of
ω
), and the period is 2π.
f x ( )
Quasi Synchronous Sampline.
π
≠
, and it can be deduced that f(x) = F
---------------- -
2
π
π
g t ( )
1
V
+
as its period, its value may be averaged through integration
F
Δ
1
⋅
( )
=
g t ( )
α
(
2
π
-- -
T
1
∫
0
=
+
α
Ts
⋅
=
T
∫
0
Δ
---------------- -
2
T≠N*Ts
g
and also a function with 2π as its perod. The
)
----- -
2
π
t ( )dt
f x ( ) x
1
π
1
+
⋅
d
Δ
2
∫
0
π
⋅
=
≠
f x ( ) x d
(
1
α
---------------- -
2
(α).
1
-- -
T
π
+
1
⋅
+
2
α
∫
(
π
TO
Δ
=
+
TO
⋅
∫
Δ
+
(
f x ( )
α
)
T
f x ( ) x d
)
+
g
2
t ( )dt
α
∫
π
+
© 2009 Microchip Technology Inc.
Δ
t
1
)
(α).
f x ( ) x
d