upd720113 Renesas Electronics Corporation., upd720113 Datasheet - Page 18

• Manufacturer Part Number: upd720113
• Description: Usb 2.0 Hub Controller
• Manufacturer: Renesas Electronics Corporation.

External Serial ROM Timing
18
Clock frequency
Clock pulse width low
Clock pulse width high
Clock low to data out valid
Time the bus must be free before a new
transmission can start
Start hold time
Start setup time
Data in hold time
Data in setup time
Stop setup time
Data out hold time
Write cycle time
(Output)
SDA
SCL
(Input)
SDA
SDA
SCL
Parameter
t
SU.STA
Word n
8th bit
Figure 2-10. External Serial ROM Write Cycle Timing
Figure 2-9. External Serial ROM Bus Timing
t
HD.STA
ACK
t
LOW
f
t
t
t
t
t
t
t
t
t
t
t
SCL
LOW
HIGH
AA
BUF
HD.STA
SU.STA
HD.DTA
SU.DTA
SU.STO
DH
WR
Symbol
t
AA
Data Sheet S16618EJ3V0DS
t
HIGH
t
HD.DAT
condition
Stop
Condition
t
LOW
t
t
DH
SU.DAT
t
WR
condition
4700
4000
4700
4000
4700
4700
MIN.
Start
100
250
300
0
t
SU.STO
TYP.
94.6
t
BUF
MAX.
3500
100
15
µ
PD720113
Unit
kHz
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns