Reference Design

IRMCS2013

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9.4 SPI Port

IRMCS2013 provides an SPI port to facilitate microprocessor interface. It works only as a slave. The connector, J10,

is a 1-by-6 header connector.

SCLK

MOSI

MISO

CS

t

SCLK

t

CSS

t

MOSIS

t

MISOZ

t

MISO

Figure 19. SPI Timing

SYMBOL

DESCRIPTION

MIN

MAX

UNITS

ADC Clock Frequency

8

MHz

ADC Clock Period

125

ns

CS to SCLK high Setup

20

ns

MOSI to SCLK low Setup

20

ns

SCLK to MISO Valid

72

ns

CS to MISO High Impedance

15

35

ns

Table 6. SPI Timing