CS495303 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
Manufacturer
CS495303 Datasheet PDF : 36 Pages
| |||
CS4953xx Data Sheet
32-bit Audio Decoder DSP Family
5.12 Switching Characteristics — Serial Control Port - I2C Slave Mode
Parameter
Symbol Min
Typical
Max
Units
SCP_CLK frequency1
SCP_CLK low time
SCP_CLK high time
SCP_SCK rising to SCP_SDA rising or falling for START or
STOP condition
fiicck
tiicckl
tiicckh
tiicckcmd
-
1.25
1.25
1.25
400
kHz
-
µs
-
µs
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
ns
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
Y SCP_CLK rising to SCB_BSY low
tiich
tiicdov
tiicirqh
tiicirql
tiicbsyl
20
-
ns
-
18
ns
-
3*DCLKP + 40 ns
3*DCLKP + 20
ns
- 3*DCLKP + 20
ns
1. The specification fiicck indicates the maximum speed of the hardware. The system designer should be aware that
R 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.
A tiicckcmd
tiicckl
tiicr
tiicf
IN SCP_CLK
01
6
7
8
01
6
tiicstscl
tiicckh
tiicdov
fiicck
IM SCP_SDA
L SCP_IRQ
A6
tiicsu
tiich
A0 R/W ACK MSB
tiicirqh
E SCP_BSY
tiicckcmd
7
8
tiicstp
LSB
ACK
tiicirql
tiicbft
tiiccbsyl
PR Figure 5. Serial Control Port - I2C Slave Mode Timing
16
Copyright 2009 Cirrus Logic
DS705PP6
Share Link: 