參數(shù)資料
型號: MCIMX27MJP4A
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA473
封裝: 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-473
文件頁數(shù): 110/152頁
文件大?。?/td> 3889K
代理商: MCIMX27MJP4A
i.MX27 and i.MX27L Data Sheet, Rev. 1.6
60
Freescale Semiconductor
Electrical Characteristics
4.3.3
Inter IC Communication (I2C)
This section describes the electrical information of the I2C module.
4.3.3.1
I2C Module Timing
The I2C communication protocol consists of seven elements: START, Data Source/Recipient, Data
Direction, Slave Acknowledge, Data, Data Acknowledge, and STOP. Figure 21 shows the timing of the
I2C module. Table 29 lists the I2C module timing parameters.
Figure 21. I2C Bus Timing Diagram
Table 28. MII Serial Management Channel Timing Parameters
ID
Parameter
Min
Max
Unit
M10
FEC_MDC falling edge to FEC_MDIO output invalid (minimum propagation delay)
0
ns
M11
FEC_MDC falling edge to FEC_MDIO output valid (max propagation delay)
5
ns
M12
FEC_MDIO (input) to FEC_MDC rising edge setup
18
ns
M13
FEC_MDIO (input) to FEC_MDC rising edge hold
0
ns
M14
FEC_MDC pulse width high
40% 60%
FEC_MDC period
M15
FEC_MDC pulse width low
40% 60%
FEC_MDC period
Table 29. I2C Module Timing Parameters
ID
Parameter
1.8 V +/–0.10 V
3.0 V +/–0.30 V
Unit
Min
Max
Min
Max
SCL Clock Frequency
0
100
0
100
kHz
IC1
Hold time (repeated) START Condition
114.8
111.1
ns
IC2
Data Hold Time
0
69.7
0
72.3
ns
IC3
Data Setup Time
3.1
1.76
ns
IC4
HIGH period of the SCL clock
69.7
68.3
ns
IC5
LOW period of the SCL clock
336.4
335.1
ns
IC6
Setup Time for STOP condition
110.5
111.1
ns
IC1
IC6
SDA
SCL
IC3
IC2
IC5
IC4
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