Cirrus-logic CS5378 Manual do Utilizador descarregar pdf (Página 14)

CS5378

DS639F3 14

SWITCHING CHARACTERISTICS

Serial Configuration Interface Timing (External Master)

Parameter Symbol Min Typ Max Unit

MOSI Write Timing

SS:EECS

Enable to Valid Latch Clock t

1

60 - - ns

Data Set-up Time Prior to SCK Rising t

2

60 - - ns

Data Hold Time After SCK Rising t

3

120 - - ns

SCK High Time t

4

120 - - ns

SCK Low Time t

5

120 - - ns

SCK Falling Prior to SS:EECS

Disable t

6

60 - - ns

MISO Read Timing

SCK Falling to New Data Bit t

7

- - 60 ns

SCK High Time t

8

120 - - ns

SCK Low Time t

9

120 - - ns

SS:EECS

Rising to MISO Hi-Z t

10

--150ns

Figure 4. MOSI Write Timing in SPI Slave Mode

SSI

MOSI

SCLK

MSB MSB - 1

LSB

t

6

t

5

t

4

t

3

t

2

t

1

SCK

SS:EECS

Figure 5. MISO Read Timing in SPI Slave Mode

MISO

SCLK

MSB MSB - 1 LSB

t

10

t

9

t

8

t

7

SSI

SS:EECS

SCK

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 87 88

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