参数资料
型号: ST72T734J6B1
厂商: 意法半导体
元件分类: ADC
英文描述: 8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C
中文描述: 8位USB单片机的显示器,高达60K章检察官办公室,每1000内存,模数转换器,定时器,同步,材质单元,脉宽调制/的BRM,的H / W DDC的
文件页数: 43/144页
文件大小: 1280K
代理商: ST72T734J6B1
ST72774/ST727754/ST72734
137/144
AC/DC ELECTRICAL CHARACTERISTICS (Cont’d)
1)The device must internally provide a hold time of at least 300 ns for the SDA signal in order to bridge the undefined
region of the falling edge of SCL
2)The maximum hold time of the START condition has only to be met if the interface does not stretch the low period of
SCL signal
Cb = total capacitance of one bus line in pF
I2C/DDC-Bus Electrical specifications
Parameter
Symbol
Unit
Standard mode I2C
Fast mode I2C
MinMax
Hysteresis of Schmitt trigger inputs
Fixed input levels
VDD-related input levels
VHYS
Vna
na
0.2
0,05 VDD
Pulse width of spikes which must be sup-
pressed by the input filter
TSP
ns
na
0 ns
50 ns
Output fall time from VIH min to VIL max with
a bus capacitance from 10 pF to 400 pF
with up to 3 mA sink current at VOL1
with up to 6 mA sink current at VOL2
TOF
ns
na
250
na
20+0.1C
b
20+0.1C
b
250
Input current each I/O pin with an input voltage
between 0.4V and 0.9 VDD max
I
A
- 10
10
-10
10
Capacitance for each I/O pin
C
pF
10
na = not applicable
Cb = capacitance of one bus in pF
I2C/DDC-Bus Timings
Parameter
Standard I2C
Fast I2C
Symbol
Unit
Min
Max
Min
Max
Bus free time between a STOP and START con-
dition
4.7
1.3
TBUF
ms
Hold time START condition. After this period,
the first clock pulse is generated
4.0
0.6
THD:STA
s
LOW period of the SCL clock
4.7
1.3
TLOW
s
HIGH period of the SCL clock
4.0
0.6
THIGH
s
Set-up time for a repeated START condition
4.7
0.6
TSU:STA
s
Data hold time
0 (1)
0.9(2)
THD:DAT
ns
Data set-up time
250
100
TSU:DAT
ns
Rise time of both SDA and SCL signals
1000
20+0.1Cb
300
TR
ns
Fall time of both SDA and SCL signals
300
20+0.1Cb
300
TF
ns
Set-up time for STOP condition
4.0
0.6
TSU:STO
ns
Capacitive load for each bus line
400
Cb
pF
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