ADSP-BF531 / ADSP-BF532 / ADSP-BF533
The following three tables describe the voltage/frequency
requirements for the processor clocks. Take care in selecting
MSEL, SSEL, and CSEL ratios so as not to exceed the maximum
core clock ( Table 10 and Table 11 ) and system clock ( Table 13 )
specifications. Table 12 describes phase-locked loop operating
conditions.
Table 10. Core Clock (CCLK) Requirements—500 MHz, 533 MHz, and 600 MHz Models
Parameter
Internal Regulator Setting
Max
Unit
f CCLK
f CCLK
f CCLK
f CCLK
f CCLK
f CCLK
f CCLK
CCLK Frequency (V DDINT = 1.3 V Minimum) 1
CCLK Frequency (V DDINT = 1.2 V Minimum) 2
CCLK Frequency (V DDINT = 1.14 V Minimum) 3
CCLK Frequency (V DDINT = 1.045 V Minimum)
CCLK Frequency (V DDINT = 0.95 V Minimum)
CCLK Frequency (V DDINT = 0.85 V Minimum)
CCLK Frequency (V DDINT = 0.8 V Minimum)
1.30 V
1.25 V
1.20 V
1.10 V
1.00 V
0.90 V
0.85 V
600
533
500
444
400
333
250
MHz
MHz
MHz
MHz
MHz
MHz
MHz
1
2
3
Applies to 600 MHz models only. See Ordering Guide on Page 63 .
Applies to 533 MHz and 600 MHz models only. See Ordering Guide on Page 63 . 533 MHz models cannot support internal regulator levels above 1.25 V.
Applies to 500 MHz, 533 MHz, and 600 MHz models. See Ordering Guide on Page 63 . 500 MHz models cannot support internal regulator levels above 1.20 V.
Table 11. Core Clock (CCLK) Requirements—400 MHz Models 1
T J = 125°C
All 2 Other T J
Parameter
Internal Regulator Setting
Max
Max
Unit
f CCLK
f CCLK
f CCLK
f CCLK
f CCLK
CCLK Frequency (V DDINT = 1.14 V Minimum)
CCLK Frequency (V DDINT = 1.045 V Minimum)
CCLK Frequency (V DDINT = 0.95 V Minimum)
CCLK Frequency (V DDINT = 0.85 V Minimum)
CCLK Frequency (V DDINT = 0.8 V Minimum)
1.20 V
1.10 V
1.00 V
0.90 V
0.85 V
400
333
295
400
364
333
280
250
MHz
MHz
MHz
MHz
MHz
1
2
Table 12. Phase-Locked Loop Operating Conditions
Parameter
Min
Max
Unit
f VCO
Voltage Controlled Oscillator (VCO) Frequency
50
Max f CCLK
MHz
Table 13. System Clock (SCLK) Requirements
V DDEXT = 1.8 V
V DDEXT = 2.5 V/3.3 V
Parameter 1
Max
Max
Unit
CSP_BGA/PBGA
f SCLK
f SCLK
CLKOUT/SCLK Frequency (V DDINT ? 1.14 V)
CLKOUT/SCLK Frequency (V DDINT ? 1.14 V)
100
100
133
100
MHz
MHz
LQFP
f SCLK
f SCLK
CLKOUT/SCLK Frequency (V DDINT ? 1.14 V)
CLKOUT/SCLK Frequency (V DDINT ? 1.14 V)
100
83
133
83
MHz
MHz
1
t SCLK (= 1/f SCLK ) must be greater than or equal to t CCLK .
Rev. I
|
Page 21 of 64 |
August 2013
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