CS497014 datasheet(16/31 Pages) CIRRUS

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CS4970x4 Data Sheet

32-bit High Definition Audio Decoder DSP Family

DS752F1

5.12 Switching Characteristics — Serial Control Port - I2C Master Mode

Figure 6. Serial Control Port - I2C Master Mode Timing

5.13 Switching Characteristics — Parallel Control Port - Intel Slave Mode

Parameter

Symbol

Min

Max

Units

SCP_CLK frequency1

1. The specification fiicck indicates the maximum speed of the hardware. The system designer should be aware that the actual

maximum speed of the communication port may be limited by the firmware application.

fiicck

—

400

kHz

SCP_CLK low time

tiicckl

1.25

—

µs

SCP_CLK high time

tiicckh

1.25

—

µs

SCP_SCK rising to SCP_SDA rising or falling for START or STOP

condition

tiicckcmd

1.25

—

µs

START condition to SCP_CLK falling

tiicstscl

1.25

—

µs

SCP_CLK falling to STOP condition

tiicstp

2.5

—

µs

Bus free time between STOP and START conditions

tiicbft

3—

µs

Setup time SCP_SDA input valid to SCP_CLK rising

tiicsu

100

—

Hold time SCP_SDA input after SCP_CLK falling2

2. This parameter is measured from the ViL level at the falling edge of the clock.

tiich

0—

SCP_CLK low to SCP_SDA out valid

tiicdov

—36

Parameter

Symbol Min

Typical

Max

Unit

Address setup before PCP_CS and PCP_RD low or PCP_CS and

PCP_WR low

tias

5—

—

Address hold time after PCP_CS and PCP_RD low or PCP_CS and

PCP_WR high

tiah

5—

—

Read

SCP_CLK

SCP_SDA

6780

tiicckl

tiicckh

tiicsu

tiich

R/W

ACK

LSB

ACK

MSB

tiicstp

tiicdov

tiicb

tiicstscl

tiicckcmd

fiicck

tiicckcmd

tiicf

tiicr

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