SAA5290A Philips Semiconductors, SAA5290A Datasheet - Page 59

• Manufacturer Part Number: SAA5290A
• Description: Economy teletext and TV microcontrollers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
13 CHARACTERISTICS FOR THE I
Notes
1. This parameter is determined by the user software. It must comply with the I
2. This value gives the auto-clock pulse length which meets the I
3. The rise time is determined by the external bus line capacitance and pull-up resistor. It must be less than 1 s.
4. The maximum capacitance on bus lines SDA and SCL is 400 pF.
1997 Jul 07
SCL timing
t
t
t
t
t
SDA timing
t
t
t
t
t
t
t
HD;STA
LOW
HIGH
rC
fC
SU;DAT1
HD;DAT
SU;STA
SU;STO
BUF
rD
fD
SYMBOL
Economy teletext and TV microcontrollers
Alternatively, the SCL pulse must be timed by software.
START condition hold time
SCL LOW time
SCL HIGH time
SCL rise time
SCL fall time
data set-up time
data hold time
repeated START set-up time
STOP condition set-up time
bus free time
SDA rise time
SDA fall time
PARAMETER
2
C-BUS INTERFACE
4.0 s
4.7 s
4.0 s
1.0 s
0.3 s
250 ns
0 ns
4.7 s
4.0 s
4.7 s
1.0 s
0.3 s
INPUT
59
2
C-bus specification for the special crystal frequency.
note 1
note 1
note 3
note 1
note 1
note 1
note 1
note 1
note 3
4.0 s; note 2
0.3 s; note 4
0.3 s; note 4
OUTPUT
2
C-bus specification.
I
4.0 s
4.7 s
4.0 s
1.0 s
0.3 s
250 ns
0 ns
4.7 s
4.0 s
4.7 s
1.0 s
0.3 s
2
C-BUS SPECIFICATION
SAA5x9x family
Preliminary specification