参数资料
型号: ST72651AR6T1E/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, ROHS COMPLIANT, TQFP-64
文件页数: 52/161页
文件大小: 2656K
代理商: ST72651AR6T1E/XXX
ST72651AR6
145/161
Doc ID 7215 Rev 4
COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
13.11.2 I2C - Inter IC Control Interface
Subject to general operating conditions for VDD,
fOSC, and TA unless otherwise specified.
Refer to I/O port characteristics for more details on
the input/output alternate function characteristics
(SDAI and SCLI). The ST7 I2C interface meets the
requirements of the Standard I2C communication
protocol described in the following table.
Figure 91. Typical Application with I2C Bus and Timing Diagram 4)
Notes:
1. Data based on standard I2C protocol requirement, not tested in production.
2. The device must internally provide a hold time of at least 300ns for the SDA signal in order to bridge the undefined
region of the falling edge of SCL.
3. 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.
4. Measurement points are done at CMOS levels: 0.3xVDD and 0.7xVDD.
Symbol
Parameter
Standard mode I2C
Fast mode I2C
Unit
Min 1)
Max 1)
Min 1)
Max 1)
tw(SCLL)
SCL clock low time
4.7
1.3
μs
tw(SCLH)
SCL clock high time
4.0
0.6
tsu(SDA)
SDA setup time
250
100
ns
th(SDA)
SDA data hold time
0 3)
0 2)
900 3)
tr(SDA)
tr(SCL)
SDA and SCL rise time
1000
20+0.1Cb
300
tf(SDA)
tf(SCL)
SDA and SCL fall time
300
20+0.1Cb
300
th(STA)
START condition hold time
4.0
0.6
μs
tsu(STA)
Repeated START condition setup time
4.7
0.6
tsu(STO)
STOP condition setup time
4.0
0.6
ns
tw(STO:STA) STOP to START condition time (bus free)
4.7
1.3
ms
Cb
Capacitive load for each bus line
400
pF
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
SCK
4.7k
Ω
SDAI
ST72XXX
SCLI
VDD
100
Ω
100
Ω
VDD
4.7k
Ω
I2CBUS
相关PDF资料
PDF描述
ST72652C4T1/XXX 8-BIT, MROM, MICROCONTROLLER, PQFP48
ST7267R8T1L/XXX 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP64
ST7267C8T1/XXX 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP48
ST72774S9T1/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
ST72E734J6D0 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42
相关代理商/技术参数
参数描述
ST7265X-EVAL/MS 制造商:STMicroelectronics 功能描述:ST6 EVAL BD - Bulk
ST7265X-EVAL/PFD 制造商:STMicroelectronics 功能描述:USB FLASH EVAL - Bulk
ST7266 制造商:6940 功能描述:ST7266
ST7267C8T1L 制造商:STMicroelectronics 功能描述:
ST72681/R12 制造商:STMicroelectronics 功能描述:CONTROLLER FOR HIGH-PERFORMANCE BUS-POWERED USB 2.0 FLASH DR - Trays