C8051F340/1/2/3/4/5/6/7

Table 20.1. SPI Slave Timing Parameters

Parameter

Description

Min

Max

Units

 

 

 

 

 

 

Master Mode Timing* (See Figure 20.8

and Figure 20.9)

 

 

 

 

 

 

 

TMCKH

SCK High Time

1 x TSYSCLK

 

ns

TMCKL

SCK Low Time

1 x TSYSCLK

 

ns

TMIS

MISO Valid to SCK Shift Edge

1 x TSYSCLK + 20

 

ns

TMIH

SCK Shift Edge to MISO Change

0

 

ns

 

Slave Mode Timing* (See Figure 20.10

and Figure 20.11)

 

 

 

 

 

 

 

TSE

NSS Falling to First SCK Edge

2 x TSYSCLK

 

ns

TSD

Last SCK Edge to NSS Rising

2 x TSYSCLK

 

ns

TSEZ

NSS Falling to MISO Valid

 

4 x TSYSCLK

ns

TSDZ

NSS Rising to MISO High-Z

 

4 x TSYSCLK

ns

TCKH

SCK High Time

5 x TSYSCLK

 

ns

TCKL

SCK Low Time

5 x TSYSCLK

 

ns

TSIS

MOSI Valid to SCK Sample Edge

2 x TSYSCLK

 

ns

TSIH

SCK Sample Edge to MOSI Change

2 x TSYSCLK

 

ns

TSOH

SCK Shift Edge to MISO Change

 

4 x TSYSCLK

ns

TSLH

Last SCK Edge to MISO Change (CKPHA = 1

6 x TSYSCLK

8 x TSYSCLK

ns

ONLY)

*Note: TSYSCLK is equal to one period of the device system clock (SYSCLK).

Rev. 0.5

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Silicon Laboratories C8051F346, C8051F347, C8051F341 SPI Slave Timing Parameters, Slave Mode Timing* See Figure, Only