MEC1322 Datasheet, PDF (414/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
38.14 I²C/SMBus Timing
FIGURE 38-20: I²C/SMBUS TIMING
I2C_DATA
t_{B U F}
t_LOW
t_R
t_F
t_{H D;ST A}
I2C_CLK
t_{HD;STA tHD;DAT tHIGH}
t_SU;DAT t_SU;STA
t_{SU;ST O}
TABLE 38-20: I²C/SMBUS TIMING PARAMETERS
Symbol
Parameter
Standard-
Mode
MIN. MAX.
f_SCL
t_BUF
t_SU;STA
t_HD;STA
t_LOW
t_HIGH
t_R
t_F
t_SU;DAT
t_HD;DAT
t_SU;STO
SCL Clock Frequency
Bus Free Time
START Condition Set-Up Time
START Condition Hold Time
SCL LOW Time
SCL HIGH Time
SCL and SDA Rise Time
SCL and SDA Fall Time
Data Set-Up Time
Data Hold Time
STOP Condition Set-Up Time
100
4.7
4.7
4.0
4.7
4.0
1.0
0.3
0.25
0
4.0
Fast-
Mode
MIN.
1.3
0.6
0.6
1.3
0.6
0.1
0
0.6
MAX.
400
0.3
0.3
Fast-
Mode Plus
MIN.
0.5
0.26
0.26
0.5
0.26
0.05
0
0.26
MAX.
1000
0.12
0.12
Units
kHz
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
DS00001719D-page 414
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