参数资料
型号: STR715FRT3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, LQFP-64
文件页数: 59/78页
文件大小: 2018K
代理商: STR715FRT3
Electrical parameters
STR71xF
62/78
Figure 33.
Typical application with I2C bus and timing diagram
Legend:
RP = External pull-up resistance
fSCL = I
2C speed
NA = Not achievable
Note:
For speeds around 200 kHz, achieved speed can have
± 5% tolerance
For other speed ranges, achieved speed can have
± 2% tolerance
The above variations depend on the accuracy of the external components used.
Table 37.
SCL Frequency Table (fPCLK1=8 MHz.,V33 = 3.3 V)
fSCL
(kHz)
I2CCCR Value
RP=4.7k
400
83
300
85h
200
8Ah
100
24h
50
4Ch
20
C4h
REPEATED START
START
STOP
START
tf(SDA)
tr(SDA)
tsu(SDA)
th(SDA)
tf(SCK)
tr(SCK)
tw(SCKL)
tw(SCKH)
th(STA)
tsu(STO)
tsu(STA)
tw(STO:STA)
SDA
SCL
4.7k
SDA
STR7
SCL
VDD
100
100
VDD
4.7k
I2CBUS
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