CS48DV2B(2008) Ver la hoja de datos (PDF) - Cirrus Logic
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CS48DV2B Datasheet PDF : 26 Pages
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CS48DV2B Data Sheet
32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby
5.11 Switching Characteristics — Serial Control Port - I2C Slave Mode
Parameter
SCP_CLK frequency1
SCP_CLK low time
SCP_CLK high time
SCP_CLK rising to SCP_SDA rising or falling for
START or STOP condition
Symbol
fiicck
tiicckl
tiicckh
tiicckcmd
Min
-
1.25
1.25
1.25
Typical
Max
Units
400
kHz
-
µs
-
µs
µs
START condition to SCP_CLK falling
tiicstscl 1.25
-
µs
SCP_CLK falling to STOP condition
Bus free time between STOP and START conditions
Setup time SCP_SDA input valid to SCP_CLK rising
Hold time SCP_SDA input after SCP_CLK falling
SCP_CLK low to SCP_SDA out valid
SCP_CLK falling to SCP_IRQ rising
NAK condition to SCP_IRQ low
SCP_CLK rising to SCB_BSY low
tiicstp
tiicbft
tiicsu
tiich
tiicdov
tiicirqh
tiicirql
tiicbsyl
2.5
3
100
20
-
-
-
-
µs
-
µs
Tns
F-
ns
18
ns
A3*DCLKP + 40 ns
R 3*DCLKP + 20
ns
D 3*DCLKP + 20
ns
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. Flow control using the SCP_BSY pin
should be implemented to prevent overflow of the input data buffer.
TIALPHI tiicckcmd
tiicckl
tiicr
tiicf
N L SCP_CLK
01
6
7
8
01
6
E E tiicstscl
tiicckh
tiicdov
fiicck
ID D SCP_SDA
F SCP_IRQ
A6
tiicsu
tiich
A0 R/W ACK MSB
tiicirqh
CON SCP_BSY
tiicckcmd
7
8
tiicstp
LSB
ACK
tiicirql
tiiccbsyl
tiicbft
Figure 5. Serial Control Port - I2C Slave Mode Timing
16
Copyright 2008 Cirrus Logic
DS875F1
CONFIDENTIAL
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