MCIMX27 Motorola Semiconductor Products, MCIMX27 Datasheet - Page 59

• Manufacturer Part Number: MCIMX27
• Manufacturer: Motorola Semiconductor Products

3.5.9
This section describes the electrical information of the I2C module.
3.5.9.1
The I2C communication protocol consists of seven elements: START, Data Source/Recipient, Data
Direction, Slave Acknowledge, Data, Data Acknowledge, and STOP.
module.
Freescale Semiconductor
M10
M11
M12
M13
M14
M15
ID
FEC_MDC falling edge to FEC_MDIO output invalid (minimum propagation delay)
FEC_MDC falling edge to FEC_MDIO output valid (max propagation delay)
FEC_MDIO (input) to FEC_MDC rising edge setup
FEC_MDIO (input) to FEC_MDC rising edge hold
FEC_MDC pulse width high
FEC_MDC pulse width low
FEC_MDIO (output)
FEC_MDC (output)
FEC_MDIO (input)
Table 28
Inter IC Communication (I
I
2
C Module Timing
lists the I2C module timing parameters.
Table 27. MII Serial Management Channel Timing Parameters
Figure 20. MII Serial Management Channel Timing Diagram
i.MX27 Data Sheet, Advance Information, Rev. 0.1
Preliminary—Subject to Change Without Notice
M12
Parameter
M13
2
M14
C)
M10
M11
M15
Figure 21
40% 60% FEC_MDC period
40% 60% FEC_MDC period
Min Max
18
—
0
0
shows the timing of I
—
—
—
5
Signal Descriptions
Unit
ns
ns
ns
ns
2
C
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