ADSP-BF705BBCZ-4 datasheet(87/116 Pages) AD

87 / 116 page

Rev. A

Page 87 of 116

September 2015

ADSP-BF700/701/702/703/704/705/706/707

Serial Peripheral Interface (SPI) Port—Slave Timing

Table 55 and Figure 32 describe serial peripheral interface (SPI) port slave operations. Note that:

• In dual mode data transmit, the SPI_MOSI signal is also an output.

• In quad mode data transmit, the SPI_MOSI, SPI_D2, and SPI_D3 signals are also outputs.

• In dual mode data receive, the SPI_MISO signal is also an input.

• In quad mode data receive, the SPI_MISO, SPI_D2, and SPI_D3 signals are also inputs.

• In SPI slave mode, the SPI clock is supplied externally and is called fSPICLKEXT:

Table 55. Serial Peripheral Interface (SPI) Port—Slave Timing

Parameter

VDD_EXT

1.8V Nominal

VDD_EXT

3.3V Nominal

MinMax

Unit

Timing Requirements

tSPICHS

SPI_CLK High Period

1 This specification indicates the minimum instantaneous width or period that can be tolerated due to duty cycle variation or jitter on the external SPI_CLK. For the external

SPI_CLK ideal maximum frequency see the fSPICLKTEXT specification in Table 18 on Page 52 of Clock Related Operating Conditions.

(0.5 × tSPICLKEXT) – 1.5

tSPICLS

SPI_CLK Low Period1

(0.5 × tSPICLKEXT) – 1.5

tSPICLK

SPI_CLK Period

tSPICLKEXT – 1.5

tHDS

Last SPI_CLK Edge to SPI_SS Not Asserted

(NonSPIHP)

tHDS

Last SPI_CLK Edge to SPI_SS Not Asserted



(Using SPIHP)

1.5 × tSCLK0

tSPITDS

Sequential Transfer Delay (NonSPIHP)

0.5 × tSPICLK – 1.5

tSPITDS

Sequential Transfer Delay (Using SPIHP)

3 × tSCLK0

tSDSCI

SPI_SS Assertion to First SPI_CLK Edge

11.5

tSSPID

Data Input Valid to SPI_CLK Edge (Data Input

Setup)

1.5

tHSPID

SPI_CLK Sampling Edge to Data Input Invalid

3.3

Switching Characteristics

tDSOE

SPI_SS Assertion to Data Out Active

17.5

14.5

tDSDHI

SPI_SS Deassertion to Data High Impedance

11.5

tDDSPID

SPI_CLK Edge to Data Out Valid (Data Out Delay)

17.5

14.5

tHDSPID

SPI_CLK Edge to Data Out Invalid (Data Out Hold) 2.5

2.5

tSPICLKEXT

fSPICLKEXT

-----------------------------

ADSP-BF705BBCZ-4 Datasheet(PDF) 87 Page - Analog Devices

ADSP-BF705BBCZ-4 Datasheet(HTML) 87 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 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL