saa5290 NXP Semiconductors, saa5290 Datasheet - Page 12

• Manufacturer Part Number: saa5290
• Description: Page Economy Teletext/tv Microcontroller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 5 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.
February 1995
SCL timing
t
t
t
t
t
SDA timing
t
t
t
t
t
t
t
SYMBOL
HD;STA
LOW
HIGH
rC
fC
SU;DAT1
HD;DAT
SU;STA
SU;STO
BUF
rD
fD
(input / output)
(input / output)
One page Economy Teletext/TV
microcontroller
Alternatively, the SCL pulse must be timed by software.
SDA
SCL
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
START or repeated START condition
t HD;STA
t fD
PARAMETER
t LOW
t rC
2
t rD
C-bus interface
t HIGH
t fC
t SU;DAT1
Fig.3 I
2
C-bus interface timing.
INPUT
250 ns
4.0 s
4.7 s
4.0 s
1.0 s
0.3 s
4.7 s
4.0 s
4.7 s
1.0 s
0.3 s
0 ns
t HD;DAT
12
2
C-bus specification for the special crystal frequency.
4.0 s; note 2
0.3 s; note 4
0.3 s; note 4
OUTPUT
note 1
note 1
note 3
note 1
note 1
note 1
note 1
note 1
note 3
STOP condition
repeated START condition
2
C-bus specification.
t SU;DAT2
I
2
C-BUS SPECIFICATION
Preliminary specification
t SU;STA
t SU;STO
0.7V DD
0.3V DD
t SU;DAT3
250 ns
4.0 s
4.7 s
4.0 s
1.0 s
0.3 s
4.7 s
4.0 s
4.7 s
1.0 s
0.3 s
SAA5290
t BUF
0 ns
START condition
MLC104
0.7V DD
0.3V DD