Philips PDIUSBH12 AC CHARACTERISTICS (I2C pins)

Philips Semiconductors Product specification
PDIUSBH12USB 2-port hub
1999 Jul 22 23
AC CHARACTERISTICS (I2C pins)
All timing values are valid within the operating supply voltage and ambient temperature range and reference to VIL and VIH with an input voltage
swing of VSS and VDD.
SYMBOL PARAMETER TEST CONDITIONS MIN MAX UNIT
fSCL SCL clock frequency 1000 kHz
tBUF Bus free time 0.5 µs
tSU;STA Start condition set-up time 0.25 µs
tHD;STA Start condition hold time 0.25 µs
tLOW SCL LOW time 0.45 µs
tHIGH SCL HIGH time 0.45 µs
trSCL and SDA rise time 0.3 µs
tfSCL and SDA fall time 0.1 µs
tSU;DAT Data set-up time 100 ns
tHD;DAT Data hold time 0 ns
tVD;DAT SCL LOW to data out valid 0.4 µs
tSU;STO Stop condition set-up time 0.25 µs
A detailed description of the I2C-bus specification, with applications, is given in the brochure “ The I
2
C-bus and how to use it ”. This brochure may
be ordered using the Philips order number 9398 393 40011.
SV00756
SCL
SDA
PROTOCOL
tSU;STA tLOW tHIGH
1/fSCL
tBUF
trtf
tHD;STA tSU;DAT tHD;DAT tVD:DAT tSU;STO
BIT 0
LSB
(R/W)
ACKNOWLEDGE
(A)
STOP
CONDITION
(P)
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
Figure 4. I2C-bus timing diagram