參數(shù)資料
型號： SAA5297AH
廠商： NXP Semiconductors N.V.
英文描述： Economy teletext and TV microcontrollers
中文描述： 經(jīng)濟(jì)圖文電視和電視微控制器
文件頁數(shù)： 59/68頁
文件大小： 612K
代理商： SAA5297AH
1997 Jul 07
59
Philips Semiconductors
Preliminary specification
Economy teletext and TV microcontrollers
SAA5x9x family
13 CHARACTERISTICS FOR THE I
2
C-BUS INTERFACE
Notes
1.
2.
This parameter is determined by the user software. It must comply with the I
2
C-bus specification.
This value gives the auto-clock pulse length which meets the I
2
C-bus specification for the special crystal frequency.
Alternatively, the SCL pulse must be timed by software.
The rise time is determined by the external bus line capacitance and pull-up resistor. It must be less than 1
μ
s.
The maximum capacitance on bus lines SDA and SCL is 400 pF.
3.
4.
SYMBOL
PARAMETER
INPUT
OUTPUT
I
2
C-BUS SPECIFICATION
SCL timing
t
HD;STA
t
LOW
t
HIGH
t
rC
t
fC
START condition hold time
SCL LOW time
SCL HIGH time
SCL rise time
SCL fall time
≥
4.0
μ
s
≥
4.7
μ
s
≥
4.0
μ
s
≤
1.0
μ
s
≤
0.3
μ
s
note 1
note 1
≥
4.0
μ
s; note 2
note 3
≤
0.3
μ
s; note 4
≥
4.0
μ
s
≥
4.7
μ
s
≥
4.0
μ
s
≤
1.0
μ
s
≤
0.3
μ
s
SDA timing
t
SU;DAT1
t
HD;DAT
t
SU;STA
t
SU;STO
t
BUF
t
rD
t
fD
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
≥
250 ns
≥
0 ns
≥
4.7
μ
s
≥
4.0
μ
s
≥
4.7
μ
s
≤
1.0
μ
s
≤
0.3
μ
s
note 1
note 1
note 1
note 1
note 1
note 3
≤
0.3
μ
s; note 4
≥
250 ns
≥
0 ns
≥
4.7
μ
s
≥
4.0
μ
s
≥
4.7
μ
s
≤
1.0
μ
s
≤
0.3
μ
s
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