LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 134

• Manufacturer Part Number: LPC47N237-MD
• Description: 3.3V I/O CONTROLLER FOR PORT REPLICATORS AND DOCKING STATIONS
• Manufacturer: SMSC [SMSC Corporation]

Note 20.10 A device will timeout when any clock low exceeds this value.
Note 20.11 T
Revision 0.3 (10-26-04)
SCLK
SDAT
Fsmb
Tbuf
Thd:sta
Tsu:sta
Tsu:sto
Thd:dat
Tsu:dat
Ttimeout
Tlow
Thigh
Tlow: sext
Tlow: mext
Tf
Tr
SYMBOL
P
HIGH
t
BUF
Max provides a simple guaranteed method for devices to detect bus idle conditions.
Repeated Start Condition setup time
Stop Condition setup time
SMB Operating Frequency
Bus free time between Stop and Start
Condition
Hold time after (Repeated) Start
Condition. After this period, the first
clock is generated.
Data hold time
Data setup time
Max. Clock low time
Clock low period
Clock high period
Cumulative clock low extend time
(slave device)
Cumulative clock low extend time
(master device)
Clock/Data Fall Time
Clock/Data Rise Time
S
t
HD;STA
t
LOW
PARAMETER
t
HD;DAT
Figure 20.21 – SMBus Timing
DATASHEET
t
R
t
HIGH
Page 134
t
SU;DAT
MIN
250
4.7
4.0
4.7
4.0
4.7
4.0
10
25
0
t
F
LIMITS
t
SU;STA
3.3v I/O Controller for Port Replicators and Docking Stations
MAX
1000
100
300
35
50
25
10
S
t
UNITS
HD;STA
kHz
ms
ms
ms
µs
µs
µs
µs
µs
µs
ns
ns
ns
ns
COMMENTS
(Note 20.10)
(Note 20.11)
SMSC DS – LPC47N237
t
SU;STO
P