SAA5531 Philips Semiconductors, SAA5531 Datasheet - Page 89
SAA5531
Manufacturer Part Number
SAA5531
Description
Enhanced TV microcontrollers with On-Screen Display OSD
Manufacturer
Philips Semiconductors
Datasheet
1.SAA5531.pdf
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Philips Semiconductors
Table 35 I
Notes
1. A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the V
2. The maximum f
3. A fast-mode I
4. C
2000 Feb 23
f
t
t
t
t
t
t
t
t
t
t
C
SCL
BUF
HD;STA
LOW
HIGH
SU;STA
HD;DAT
SU;DAT
r
f
SU;STO
SYMBOL
b
Enhanced TV microcontrollers with
On-Screen Display (OSD)
signal) in order to bridge the undefined region of the falling edge of SCL.
must then be met. This will automatically be the case if the device does not stretch the LOW period of the SCL signal.
If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line
t
is released.
r(max)
b
= total capacitance of one bus line in pF.
+ t
2
C-bus characteristics
SU;DAT
SCL clock frequency
bus free time between a STOP and START condition
hold time (repeated) START condition. After this period, the
first clock pulse is generated.
LOW period of the SCL clock
HIGH period of the SCL clock
set-up time for a repeated START condition
data hold time; notes 1 and 2
data set-up time, note 3
rise time of both SDA and SCL signals; note 4
fall time of both SDA and SCL signals; note 4
set-up time for STOP condition
capacitive load for each bus line
2
C-bus device can be used in a standard mode I
HD;DAT
= 1000 + 250 +1250 ns (according to the standard mode I
has only to be met if the device does not stretch the LOW period t
PARAMETER
89
2
C-bus system but the requirement t
0
1.3
0.6
1.3
0.6
0.6
0
100
20
20
0.6
2
C-bus specification) before the SCL line
FAST-MODE I
MIN.
400
0.9
300
300
400
LOW
2
Preliminary specification
MAX.
C-bus
of the SCL signal.
IL(min)
SU;DAT
SAA55xx
of the SCL
UNIT
kHz
250 ns
pF
ns
ns
ns
s
s
s
s
s
s
s
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