BF516 datasheet(21/68 Pages) AD

21 / 68 page

ADSP-BF512/BF512F, BF514/BF514F, BF516/BF516F, BF518/BF518F

Rev. B

Page 21 of 68

January 2011

Table 8 shows settings for TWI_DT in the NONGPIO_DRIVE

Clock Related Operating Conditions

Table 9 describes the timing requirements for the processor

clocks. Take care in selecting MSEL, SSEL, and CSEL ratios so as

not to exceed the maximum core clock and system clock.

Table 10 describes phase-locked loop operating conditions.

Table 8. TWI_DT Field Selections and VDDEXT/VBUSTWI

TWI_DT

VDDEXT Nominal

VBUSTWI Minimum

VBUSTWI Nominal

VBUSTWI Maximum

Unit

000 (default)

3.3

2.97

3.3

3.63

001

1.8

1.7

1.8

1.98

010

2.5

2.97

3.3

3.63

011

1.8

2.97

3.3

3.63

100

3.3

4.5

5.5

101

1.8

2.25

2.5

2.75

110

2.5

2.25

2.5

2.75

111 (reserved)

——

———

Table 9. Core Clock (CCLK) Requirements

Parameter

Nominal

Voltage Setting

Maximum

Unit

fCCLK

Core Clock Frequency (VDDINT =1.33 V Minimum, All Models)

1.400 V

400

MHz

Core Clock Frequency (VDDINT =1.23 V Minimum, Industrial/Commercial Models)

1.300 V

300

MHz

Core Clock Frequency (VDDINT = 1.14 V Minimum, Industrial Models Only)

1.200 V

200

MHz

Core Clock Frequency (VDDINT = 1.10 V Minimum, Commercial Models Only)

1.150 V

200

MHz

Table 10. Phase-Locked Loop Operating Conditions

Parameter

Min

Max

Unit

fVCO

Voltage Controlled Oscillator (VCO) Frequency

(Commercial/Industrial Models)

Instruction Rate

MHz

Voltage Controlled Oscillator (VCO) Frequency

(Automotive Models)

Instruction Rate1

MHz

1 For more information, see Ordering Guide on Page 65.

Table 11. SCLK Conditions

DDEXT/VDDMEM

1.8 V Nominal

DDEXT/VDDMEM

2.5 V or 3.3 V Nominal

Parameter1

Max

Unit

SCLK

CLKOUT/SCLK Frequency (V

DDINT ≥ 1.230 V

Minimum)

100

MHz

SCLK

CLKOUT/SCLK Frequency (V

DDINT < 1.230 V )

MHz

1 f

SCLK must be less than or equal to fCCLK and is subject to additional restrictions for SDRAM interface operation. See Table 28 on Page 31.

BF516 Datasheet(PDF) 21 Page - Analog Devices

BF516 Datasheet(HTML) 21 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

Datasheet Download

Link URL