Cirrus-logic CS48DV2B User Manual download pdf (Page 16)

CS48DV2B Data Sheet

32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby

CONFIDENTIAL

CONFIDENTI

DRA

ELPHI

5.11 Switching Characteristics — Serial Control Port - I

C Slave Mode

Figure 5. Serial Control Port - I

C Slave Mode Timing

Parameter Symbol Min Typical Max Units

SCP_CLK frequency

1. The specification f

iicck

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. Flow control using the SCP_BSY

should be implemented to prevent overflow of the input data buffer.

iicck

- 400 kHz

SCP_CLK low time t

iicckl

1.25 - µs

SCP_CLK high time t

iicckh

1.25 - µs

SCP_CLK rising to SCP_SDA rising or falling for

START or STOP condition

iicckcmd

1.25 µs

START condition to SCP_CLK falling t

iicstscl

1.25 - µs

SCP_CLK falling to STOP condition t

iicstp

2.5 - µs

Bus free time between STOP and START conditions t

iicbft

3-µs

Setup time SCP_SDA input valid to SCP_CLK rising t

iicsu

100 ns

Hold time SCP_SDA input after SCP_CLK falling t

iich

20 - ns

SCP_CLK low to SCP_SDA out valid t

iicdov

-18ns

SCP_CLK falling to SCP_IRQ

rising t

iicirqh

-3

DCLKP + 40 ns

NAK condition to SCP_IRQ

low t

iicirql

DCLKP + 20 ns

SCP_CLK rising to SCB_BSY

low t

iicbsyl

-3

DCLKP + 20 ns

CP_BSY

CP_CLK

SCP_SDA

SCP_IRQ

01 67801 7

iicckl

iicckh

iicsu

iich

A6 A0 R/W ACK

LSB

iicirqh

iicirql

ACK

MSB

iicstp

iiccbsyl

iicdov

iicb

iicstscl

iicckcmd

iicck

iicckcmd

iicf

iicr

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 25 26

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