
ADSP-BF531/ADSP-BF532/ADSP-BF533
Rev. 0
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Page 21 of 56
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March 2004
TIMING SPECIFICATIONS
Table 10
through
Table 14
describe the timing requirements for
the ADSP-BF531/2/3 processor clocks. Take care in selecting
MSEL, SSEL, and CSEL ratios so as not to exceed the maximum
core clock and system clock as described in
Absolute Maximum
Ratings on Page 20
, and the Voltage Controlled Oscillator
(VCO) operating frequencies described in
Table 13
.
Table 13
describes Phase-Locked Loop operating conditions.
Table 10. Core and System Clock Requirements—ADSP-BF533SKBC600
Parameter
t
CCLK
t
CCLK
t
CCLK
t
CCLK
t
CCLK
t
SCLK
Min
1.67
2.10
2.35
2.66
4.00
Maximum of 7.5 or t
CCLK
Max
Unit
ns
ns
ns
ns
ns
ns
Core Cycle Period (V
DDINT
=1.2 V–5%)
Core Cycle Period (V
DDINT
=1.1 V–5%)
Core Cycle Period (V
DDINT
=1.0 V–5%)
Core Cycle Period (V
DDINT
=0.9 V–5%)
Core Cycle Period (V
DDINT
=0.8 V)
System Clock Period
Table 11. Core and System Clock Requirements—ADSP-BF533SBBC500 and ADSP-BF533SBBZ500
Parameter
t
CCLK
t
CCLK
t
CCLK
t
CCLK
t
CCLK
t
SCLK
Min
2.0
2.25
2.50
3.00
4.00
Maximum of 7.5 or t
CCLK
Max
Unit
ns
ns
ns
ns
ns
ns
Core Cycle Period (V
DDINT
=1.2 V–5%)
Core Cycle Period (V
DDINT
=1.1 V–5%)
Core Cycle Period (V
DDINT
=1.0 V–5%)
Core Cycle Period (V
DDINT
=0.9 V–5%)
Core Cycle Period (V
DDINT
=0.8 V)
System Clock Period
Table 12. Core and System Clock Requirements—ADSP-BF532/531 All Package Types
Parameter
t
CCLK
t
CCLK
t
CCLK
t
CCLK
t
CCLK
t
SCLK
Min
2.5
2.75
3.00
3.25
4.0
Maximum of 7.5 or t
CCLK
Max
Unit
ns
ns
ns
ns
ns
ns
Core Cycle Period (V
DDINT
=1.2 V–5%)
Core Cycle Period (V
DDINT
=1.1 V–5%)
Core Cycle Period (V
DDINT
=1.0 V–5%)
Core Cycle Period (V
DDINT
=0.9 V–5%)
Core Cycle Period (V
DDINT
=0.8 V)
System Clock Period
Table 13. Phase-Locked Loop Operating Conditions
Parameter
f
VCO
Min
50
Max
Max CCLK
Unit
MHz
Voltage Controlled Oscillator (VCO) Frequency
Table 14. Maximum SCLK Conditions
Parameter
Condition
V
DDEXT
= 3.3 V
V
DDEXT
= 2.5 V
Unit
MBGA
f
SCLK
f
SCLK
LQFP
f
SCLK
f
SCLK
1
Set bit 7 (output delay) of PLL_CTL register.
V
DDINT
>=
1.14 V
V
DDINT
<
1.14 V
133
100
133
100
MHz
MHz
V
DDINT
>=
1.14 V
V
DDINT
<
1.14 V
133
83
133
1
83
1
MHz
MHz