DSPB56362AG120 Freescale Semiconductor, DSPB56362AG120 Datasheet - Page 111

• Manufacturer Part Number: DSPB56362AG120
• Description: IC DSP 24BIT AUD 120MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: Symphony™r
• Type: Audio Processorr

Specifications of DSPB56362AG120

• Interface: Host Interface, I²C, SAI, SPI
• Clock Rate: 120MHz
• Non-volatile Memory: ROM (126 kB)
• On-chip Ram: 42kB
• Voltage - I/o: 3.30V
• Voltage - Core: 3.30V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Device Core Size: 24b
• Architecture: Modified Harvard
• Format: Fixed Point
• Clock Freq (max): 120MHz
• Mips: 120
• Device Input Clock Speed: 120MHz
• Ram Size: 42KB
• Program Memory Size: 90KB
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.14V
• Operating Supply Voltage (max): 3.46V
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Product: DSPs
• Data Bus Width: 24 bit
• Processor Series: DSP563xx
• Core: 56000
• Numeric And Arithmetic Format: Fixed-Point
• Instruction Set Architecture: Modified Harvard
• Device Million Instructions Per Second: 120 MIPS
• Maximum Clock Frequency: 120 MHz
• Program Memory Type: Flash
• Data Ram Size: 42 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Interface Type: SPI, I2C, ESAI, SHI
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.3
Power dissipation is a key issue in portable DSP applications. Some of the factors which affect current
consumption are described in this section. Most of the current consumed by CMOS devices is alternating
current (ac), which is charging and discharging the capacitances of the pins and internal nodes.
Current consumption is described by the following formula:
where:
The maximum internal current (I
on best-case operation conditions, which is not necessarily a real application case. The typical internal
current (I
For applications that require very low current consumption, do the following:
Freescale Semiconductor
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For a Port A address pin loaded with 50 pF capacitance, operating at 3.3 V, and with a 100 MHz clock, toggling
at its maximum possible rate (50 MHz), the current consumption is
Consider all device loads as well as parasitic capacitance due to PCB traces when calculating
capacitance. This is especially critical in systems with higher capacitive loads that could create
higher transient currents in the V
All inputs must be terminated (i.e., not allowed to float) using CMOS levels, except for the pins
with internal pull-up resistors (TRST, TMS, DE, TCK, and TDI).
Take special care to minimize noise levels on the V
If multiple DSP56362 devices are on the same board, check for cross-talk or excessive spikes on
the supplies due to synchronous operation of the devices.
RESET must be asserted when the chip is powered up. A stable EXTAL signal should be supplied
before deassertion of RESET.
At power-up, ensure that the voltage difference between the 5 V tolerant pins and the chip V
never exceeds 3.95 V.
C
V
f
Set the EBD bit when not accessing external memory.
Minimize external memory accesses and use internal memory accesses.
Minimize the number of pins that are switching.
Minimize the capacitive load on the pins.
Connect the unused inputs to pull-up or pull-down resistors.
CCItyp
Power Consumption Considerations
= node/pin capacitance
= voltage swing
= frequency of node/pin toggle
) value reflects the average switching of the internal buses on typical operating conditions.
I
=
CCI
50 10
max) value reflects the typical possible switching of the internal buses
Example 1. Current Consumption
×
DSP56362 Technical Data, Rev. 4
CC
–
12
and GND circuits.
I
×
=
3.3
C V
×
×
50
×
×
f
CCP
10
6
, GND
=
8.25mA
P
, and GND
Power Consumption Considerations
P1
pins.
CC
5-3