I2c-bus timing characteristics, Ptn3501 maintenance and control device, C-bus timing characteristics – Philips PTN3501 User Manual
Page 11
Philips Semiconductors
Product specification
PTN3501
Maintenance and control device
2001 Jan 17
11
I
2
C-BUS TIMING CHARACTERISTICS
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
I
2
C-bus timing (see Figure 19; Note 1)
f
SCL
SCL clock frequency
–
–
400
kHz
t
SW
tolerable spike width on bus
–
–
50
ns
t
BUF
bus free time
1.3
–
–
µ
s
t
SU;STA
START condition set–up time
0.6
–
–
µ
s
t
HD;STA
START condition hold time
0.6
–
–
µ
s
t
r
SCL and SDA rise time
–
–
0.3
µ
s
t
f
SCL and SDA fall time
–
–
0.3
µ
s
t
SU;DAT
data set–up time
250
–
–
ns
t
HD;DAT
data hold time
0
–
–
ns
t
VD;DAT
SCL LOW to data out valid
–
–
1.0
µ
s
t
SU;STO
STOP condition set–up time
0.6
–
–
µ
s
NOTE:
1. All the timing values are valid within the operating supply voltage and ambient temperature range and refer to V
IL
and V
IH
with an input
voltage swing of V
SS
to V
DD
.
handbook, full pagewidth
SCL
SDA
MBD820
BIT 0
LSB
(R/W)
t
HD;STA
t
SU;DAT
t
HD;DAT
t
VD;DAT
t
SU;STO
t
f
r
t
t
BUF
t
SU;STA
1 / f
SCL
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
ACKNOWLEDGE
(A)
STOP
CONDITION
(P)
SW00561
PROTOCOL
Figure 19.