ADSP-21375KSZ-2B Analog Devices Inc, ADSP-21375KSZ-2B Datasheet - Page 19

• Manufacturer Part Number: ADSP-21375KSZ-2B
• Description: IC DSP 32BIT 266MHZ 208-MQFP
• Manufacturer: Analog Devices Inc
• Series: SHARC®r
• Type: Floating Pointr

Specifications of ADSP-21375KSZ-2B

• Interface: DAI, DPI
• Clock Rate: 266MHz
• Non-volatile Memory: ROM (256 kB)
• On-chip Ram: 64kB
• Voltage - I/o: 3.30V
• Voltage - Core: 1.20V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 208-MQFP, 208-PQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note the definitions of various clock periods shown in
which are a function of CLKIN and the appropriate ratio con-
trol shown in
Table 13. ADSP-21371/ADSP-21375 CLKIN and CCLK
Clock Generation Operation
Table 14. Clock Periods
1
SR = serial port-to-core clock ratio (wide range, determined by SPORT CLKDIV
bits in DIVx register)
SPIR = SPI-to-Core Clock Ratio (wide range, determined by SPIBAUD register
setting)
SDR=SDRAM-to-Core Clock Ratio (Values determined by bits 20-18 of the
PMCTL register)
Timing
Requirements
CLKIN
CCLK
Timing
Requirements
t
t
t
t
t
t
where:
CK
CCLK
PCLK
SCLK
SDCLK
SPICLK
Table
13.
Description
Input Clock
Core Clock
Description
CLKIN Clock Period
(Processor) Core Clock Period
(Peripheral) Clock Period = 2 × t
Serial Port Clock Period = (t
SDRAM Clock Period = (t
SPI Clock Period = (t
1
Calculation
1/t
1/t
CK
CCLK
PCLLK
CCLK
) × SPIR
PCLK
) × SDR
Rev. B | Page 19 of 52 | June 2008
) × SR
CCLK
Table 14
Use the exact timing information given. Do not attempt to
derive parameters from the addition or subtraction of others.
While addition or subtraction would yield meaningful results
for an individual device, the values given in this data sheet
reflect statistical variations and worst cases. Consequently, it is
not meaningful to add parameters to derive longer times. See
Figure 36 on Page 46
ence levels.
Switching Characteristics specify how the processor changes its
signals. Circuitry external to the processor must be designed for
compatibility with these signal characteristics. Switching char-
acteristics describe what the processor will do in a given
circumstance. Use switching characteristics to ensure that any
timing requirement of a device connected to the processor (such
as memory) is satisfied.
f
Timing Requirements apply to signals that are controlled by cir-
cuitry external to the processor, such as the data input for a read
operation. Timing requirements guarantee that the processor
operates correctly with other devices.
INPUT
= CLKIN/2 when the input divider is enabled.
ADSP-21371/ADSP-21375
under Test Conditions for voltage refer-