mpc8555e Freescale Semiconductor, Inc, mpc8555e Datasheet - Page 49

• Manufacturer Part Number: mpc8555e
• Description: Mpc8555e Powerquicc Iii Processor With Integrated Security
• Manufacturer: Freescale Semiconductor, Inc

The following two tables are examples of I2C AC parameters at I2C clock value of 100k and 400k
respectively.
Freescale Semiconductor
SCL clock frequency (slave)
SCL clock frequency (master)
Bus free time between transmissions
Low period of SCL
High period of SCL
Start condition setup time
Start condition hold time
Data hold time
Data setup time
SDA/SCL rise time
SDA/SCL fall time
Stop condition setup time
SCL clock frequency (slave)
SCL clock frequency (master)
Bus free time between transmissions
Low period of SCL
High period of SCL
Start condition setup time
Start condition hold time
Data hold time
Data setup time
SDA/SCL rise time
SDA/SCL fall time (master)
Stop condition setup time
MPC8555E PowerQUICC™ III Integrated Communications Processor Hardware Specification, Rev. 4.2
Characteristic
Characteristic
Table 36. CPM I2C Timing (f
Table 37. CPM I2C Timing (f
Expression
Expression
t
t
t
t
t
t
t
t
t
t
SDVCH
SCHDH
SDHDL
SCLCH
SCHCL
SCHDL
SCLDX
SDLCL
SRISE
SFALL
f
f
SCL
SCL
t
t
t
t
t
t
t
t
t
t
SCHDH
SDVCH
SDHDL
SCLCH
SCHCL
SCHDL
SDLCL
SCLDX
SRISE
SFALL
f
f
SCL
SCL
SCL
SCL
=100 kHz)
=400 kHz)
Min
4.7
4.7
—
—
—
—
4
2
3
2
3
2
Min
420
630
420
630
420
Frequency = 100 kHz
1.2
1.2
—
—
—
—
Frequency = 400 kHz
1
Max
100
100
303
Max
—
—
—
—
—
—
—
—
400
400
250
1
—
—
—
—
—
—
—
75
—
Unit
Unit
kHz
kHz
kHz
kHz
μs
μs
μs
μs
μs
μs
μs
μs
ns
μs
μs
μs
μs
ns
ns
ns
ns
ns
ns
ns
CPM
49