EMC6D100-DK SMSC [SMSC Corporation], EMC6D100-DK Datasheet - Page 72

• Manufacturer Part Number: EMC6D100-DK
• Description: ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
• Manufacturer: SMSC [SMSC Corporation]

10.2
SMSC EMC6D100/EMC6D101
SDA
SCLK
F
T
T
T
T
T
T
T
T
T
T
T
C
SYMBOL
SMB
SP
BUF
HD
SU
SU
HD
SU
LOW
HIGH
F
R
P
b
SmBus Interface
Note 1:
System Management Bus Specification, Rev 1.1. This corresponds to the maximum clock frequency for
fast mode devices on the I
Note 2:
Note 3:
ns (T
:
:
:
:
:
STA
STO
DAT
STA
DAT
t
BUF
R
max) + 250 ns (T
S
The SMBus timing (e.g., max clock frequency of 400kHz) specified exceeds that specified in the
At 400kHz, spikes of a maximum pulse width of 50ns must be suppressed by the input filter.
If using 100 kHz clock frequency, the next data bit output to the SDA line will be 1250 ns (1000
SMB Operating Frequency
Spike Suppression
Bus free time between Stop and Start
Condition
Hold time after (Repeated) Start
Condition. After this period, the first
clock is generated.
Repeated Start Condition setup time
Stop Condition setup time
Data hold time
Data setup time
Clock low period
Clock high period
Clock/Data Fall Time
Clock/Data Rise Time
Capacitive load for each bus line
t
HD;STA
t
LOW
t
HD;DAT
PARAMETER
SU
2
:
C bus. See “The I
DAT
t
R
min) @ 100 kHz) before the SCLK line is released.
FIGURE 10.3 – SmBus TIMING
DATASHEET
t
HIGH
Page 72
2
t
C Bus Specification,” version 2.0, Dec. 1998.
SU;DAT
t
F
t
20+0.1C
20+0.1C
SU;STA
MIN
100
1.3
0.6
0.6
0.6
0.3
1.3
0.6
10
LIMITS
b
b
S
MAX
400
300
300
400
0.9
50
t
HD;STA
Environmental Monitoring and Control Device
UNITS
kHz
pF
ns
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
COMMENTS
t
SU;STO
Note 1
Note 2
Note 3
Rev. 09-09-04
P
Datasheet