STR91XF_07 Datasheet, PDF (62/73 Pages) STMicroelectronics – ARM966E-S TM 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA

Electrical characteristics
STR91xF
6.14 Communication interface electrical characteristics
6.14.1 10/100 Ethernet MAC electrical characteristics
V_DDQ = 2.7 - 3.6V, V_DD = 1.65 - 2V, T_A = -40 / 85 °C unless otherwise specified.
Ethernet MII Interface Timings
Figure 16. MII_RX_CLK and MII_TX_CLK timing diagram
3
MII_RX_TCLK, MII_TX_CLK
2
1
4
4
Table 24. MII_RX_CLK and MII_TX_CLK timing table
Symbol
Parameter
Value
Symbol
Unit
Min
Max
1
Cycle time
t_c(CLK)
40
ns
2
Pulse duration HIGH
t_HIGH(CLK)
40%
60%
3
Pulse duration LOW
t_LOW(CLK)
40%
60%
4
Transition time
t_t(CLK)
1
ns
Figure 17. MDC timing diagram
MDC
3
2
1
4
4
Table 25. MDC timing table
Symbol
Parameter
Value
Symbol
Unit
Min
Max
1
Cycle time
t_c(MDC)
266
ns
2
Pulse duration HIGH
t_HIGH(MDC)
40%
60%
3
Pulse duration LOW
t_LOW(MDC)
40%
60%
4
Transition time
t_t(MDC)
1
ns
Ethernet MII management timings
Figure 18. Ethernet MII management timing diagram
MDC
MDIO
output
MDIO
input
1
2
3
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