Lucent Technologies MN10285K - Manual (Page 300)

I
2
C Bus Controller
SDA and SCL Waveform Characteristics
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company
299
Panasonic
13.5 SDA and SCL Waveform Characteristics
Figure 13-6 and table 13-5 provide the timing definitions and specifications for
the for the MN102H75K/85K I
2
C bus interface.
Figure 13-6 SDA and SCL Waveforms
SDA
t
HD ; DAT
P
SCL
t
HIGH
t
BUF
t
HD ;STA t
LOW
t
R
t
SU ; STO t
HD ; STA
t
F
t
SU ; DAT
t
SU ; STA
S
Sr P
Table 13-5 SDA and SCL Waveform Characteristics
Parameter Symbol Min Max Unit
SCL clock frequency f
SCL
0 100 kHz
Bus free time between a stop and start condition t
BUF
20 — µs
Hold time (repeated) start condition t
HD;STA
4.0 —
Low period of the SCL clock t
LOW
4.7 —
High period of the SCL clock t
HIGH
4.0 —
Setup time for a repeated start condition t
SU;STA
4.7 —
Data hold time t
HD;DAT
300 — ns
Data setup time t
SU;DAT
250 —
SDA and SCL rise time t
R
— 1000
SDA and SCL fall time t
F
— 300
Stop condition setup time t
SU;STO
4.0 µs