Switching Characteristics
Page 41
Figure 11 shows the timing diagram for MDIO timing characteristics.
Figure 11. MDIO Timing Diagram
MDC
Td
MDIO_OUT
MDIO_IN
Th
Tsu
I2C Timing Characteristics
Table 45 lists the I2C timing characteristics for Cyclone V devices.
Table 45. I2C Timing Requirements for Cyclone V Devices
Standard Mode
Fast Mode
Symbol
Description
Unit
Min
—
4.7
4
Max
10
Min
Max
2.5
—
Tclk
Tclkhigh
Tclklow
Serial clock (SCL) clock period
SCL high time
—
0.6
1.3
µs
µs
µs
—
SCL low time
—
—
Setup time for serial data line (SDA) data to
SCL
Ts
0.25
—
0.1
—
µs
Th
Hold time for SCL to SDA data
0
—
4.7
4
3.45
0.2
—
0
0.9
0.2
—
—
—
µs
µs
µs
µs
µs
Td
SCL to SDA output data delay
—
Tsu_start
Thd_start
Tsu_stop
Setup time for a repeated start condition
Hold time for a repeated start condition
Setup time for a stop condition
0.6
0.6
0.6
—
4
—
Figure 12 shows the timing diagram for I2C timing characteristics.
Figure 12. I2C Timing Diagram
I2C_SCL
Td
Ts
Tsu_stop
Tsu_start Thd_start
Th
Data In
Data Out
I2C_SDA
July 2014 Altera Corporation
Cyclone V Device Datasheet
INTEL [ INTEL ]
