DSPB56374AE Freescale Semiconductor, DSPB56374AE Datasheet - Page 30

• Manufacturer Part Number: DSPB56374AE
• Description: IC DSP 24BIT 150MHZ 52-LQFP
• Manufacturer: Freescale Semiconductor
• Series: Symphony™r
• Type: Audio Processorr

Specifications of DSPB56374AE

• Interface: Host Interface, I²C, SAI, SPI
• Clock Rate: 150MHz
• Non-volatile Memory: ROM (84 kB)
• On-chip Ram: 54kB
• Voltage - I/o: 3.30V
• Voltage - Core: 1.25V
• Operating Temperature: -40°C ~ 110°C
• Mounting Type: Surface Mount
• Package / Case: 52-LQFP
• Product: DSPs
• Data Bus Width: 24 bit
• Processor Series: DSP563xx
• Core: 56000
• Numeric And Arithmetic Format: Fixed-Point
• Device Million Instructions Per Second: 150 MIPS
• Maximum Clock Frequency: 150 MHz
• Program Memory Type: Flash
• Program Memory Size: 24 KB
• Data Ram Size: 54 KB
• Operating Supply Voltage: 1.25 V or 3.3 V
• Maximum Operating Temperature: + 110 C
• Mounting Style: SMD/SMT
• Interface Type: SIA, SHI
• Minimum Operating Temperature: - 40 C
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

External Clock Operation
If the DSP56374 system clock is an externally supplied square wave voltage source, it is connected to
EXTAL (Figure 2.). When the external square wave source connects to EXTAL, the XTAL pin is not used.
30
Note:
No.
6
7
8
9
EXTAL
EXTAL input high
(40% to 60% duty cycle)
EXTAL input low
(40% to 60% duty cycle)
EXTAL cycle time
Instruction cycle time= I
The midpoint is 0.5 (V
• With PLL disabled
• With PLL enabled
• With PLL disabled
• With PLL enabled
V
IL
Characteristics
ETH
2
1
6
IH
CYC
Figure 2. External Clock Timing
Suggested component values:
f
R = 1 M ±10%
C (EXTAL)= 18 pF
C (XTAL) = 47 pF
Calculations are for a 12 - 49 MHz crystal with the following parameters:
• shunt capacitance (C
• series resistance 40 Ohm
• drive level of 10 µW
osc = 24.576 MHz
+ V
DSP56374 Data Sheet, Rev. 4.2
8
Table 19. Clock Operation
= T
ETL
IL
).
C
3
7
ETC
Symbol
Icyc
Eth
Etc
Etl
0
) of 10 pF - 12 pF
3.33
3.33
6.67
6.67
6.67
Min
50
Midpoint
13.33
Max
200
50
50
inf
inf
V
IH
Freescale Semiconductor
Units
ns
ns
ns
ns