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Chapter 23. Electrical Characteristics
23-17
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Debug AC Timing Specifications
PRELIMINAR
Y
Figure 23-12. MII Transmit Signal Timing Diagram
23.4.2.3 MII Async Inputs Signal Timing (CRS and COL)
Table 23-13 lists MII asynchronous inputs signal timing.
Figure 23-13 shows MII asynchronous input timings listed in Table 23-13.
Figure 23-13. MII Async Inputs Timing Diagram
23.4.2.4 MII Serial Management Channel Timing (MDIO and MDC)
Table 23-14 lists MII serial management channel timings. The FEC functions correctly
with a maximum MDC frequency of 2.5 MHz.
Figure 23-14 shows MII serial management channel timings listed in Table 23-14.
Table 23-13. MII Async Inputs Signal Timing
Num
Characteristic
Min
Max
Unit
M9
1
1
E_COL has the same timing in 10 Mbit 7-wire interface mode.
E_CRS, E_COL minimum pulse width
1.5
—
E_TxCLK period
Table 23-14. MII Serial Management Channel Timing
Num
Characteristic
Min
Max
Unit
M10
MDC falling edge to MDIO output invalid (minimum propagation delay)
0
—
nS
M11
MDC falling edge to MDIO output valid (max prop delay)
—
25
nS
M12
MDIO (input) to MDC rising edge setup
10
—
nS
M13
MDIO (input) to MDC rising edge hold
0
—
nS
M14
MDC pulse width high
40%
60%
MDC period
M15
MDC pulse width low
40%
60%
MDC period
M6
E_TxCLK (input)
E_TxD[3:0] (outputs)
E_TxEN
E_TxER
M5
M7
M8
E_CRS, E_COL
M9
Содержание DigitalDNA ColdFire MCF5272
Страница 1: ...MCF5272UM D Rev 0 02 2001 MCF5272 ColdFire Integrated Microprocessor User s Manual ...
Страница 38: ...xxxviii MCF5272 User s Manual TABLES Table Number Title Page Number ...
Страница 58: ...1 10 MCF5272 User s Manual MCF5272 Specific Features ...
Страница 90: ...2 42 MCF5272 User s Manual Exception Processing Overview ...
Страница 96: ...3 6 MCF5272 User s Manual MAC Instruction Execution Timings ...
Страница 158: ...5 46 MCF5272 User s Manual Motorola Recommended BDM Pinout ...
Страница 184: ...7 12 MCF5272 User s Manual Interrupt Controller Registers ...
Страница 338: ...13 44 MCF5272 User s Manual Application Examples ...
Страница 414: ...18 6 MCF5272 User s Manual PWM Programming Model ...
Страница 452: ...19 38 MCF5272 User s Manual Power Supply Pins ...
Страница 482: ...20 30 MCF5272 User s Manual Reset Operation ...
Страница 492: ...21 10 MCF5272 User s Manual Non IEEE 1149 1 Operation ...
Страница 548: ...INDEX Index 12 MCF5272 User s Manual ...