STR91XFA STMICROELECTRONICS [STMicroelectronics], STR91XFA Datasheet - Page 65
STR91XFA
Manufacturer Part Number
STR91XFA
Description
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.STR91XFA.pdf
(78 pages)
- Current page: 65 of 78
- Download datasheet (2Mb)
STR91xFA
6.15
6.15.1 10/100 Ethernet MAC electrical characteristics
Communication interface electrical characteristics
V
Ethernet MII Interface Timings
Figure 18. MII_RX_CLK and MII_TX_CLK timing diagram
Table 28.
Figure 19. MDC timing diagram
Table 29.
Ethernet MII management timings
Figure 20. Ethernet MII management timing diagram
DDQ
MII_RX_TCLK, MII_TX_CLK
Symbol
Symbol
= 2.7 - 3.6V, V
MDIO
output
1
2
3
4
1
2
3
4
MDIO
input
MDC
MDC
MII_RX_CLK and MII_TX_CLK timing table
MDC timing table
Cycle time
Pulse duration HIGH
Pulse duration LOW
Transition time
Cycle time
Pulse duration HIGH
Pulse duration LOW
Transition time
DD
= 1.65 - 2V, T
Parameter
Parameter
2
1
3
2
1
1
3
A
= -40 / 85 °C unless otherwise specified.
t
t
t
t
t
t
t
t
c
HIGH
LOW
t
c
HIGH
LOW
t
(CLK)
(MDC)
(CLK)
(MDC)
Symbol
Symbol
(CLK)
(MDC)
(CLK)
(MDC)
2
4
3
4
40%
40%
40%
40%
Min
Min
266
40
4
4
Value
Value
Electrical characteristics
Max
60%
60%
Max
60%
60%
1
1
Unit
Unit
ns
ns
ns
ns
65/78
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