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7. I
2
C Interface > Bus Timing
185
Tsi576 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
7.13
Bus Timing
shows the relationship of the bus timing parameters to the generation of the I2C_SCLK and
I2C_SD signals on the I
2
C bus. These parameters are configured in the following registers:
•
C Start Condition Setup/Hold Timing Register”
•
•
“I2C_SD Setup and Hold Timing Register”
•
•
“I2C_SCLK High and Low Timing Register”
•
“I2C_SCLK Minimum High and Low Timing Register”
The bus timing resets to 100-kHz operation. By reprogramming these registers, other bus speeds can be
configured. Speeds above 100 kHz are not guaranteed to conform to the
I
2
C Specification
because of
the absence of Schmitt triggers on the input of the I2C_SD and I2C_SCLK signals, and the absence of
slope controlled outputs for the I2C_SD and I2C_SCLK signals. It is up to the board or system
designer to decide on the applicability of operation at speeds above 100 kHz.
Bus timing does not normally change during a transaction, even if these registers are changed. The
timing registers are sampled at certain times to prevent this from occurring. The following are the times
when timing adjustments take effect:
•
On hard reset (times are reset to 100 kHz)
•
When reset using the
•
At the start of a master transaction through the
, when the START
condition is generated
•
Upon a chain operation during boot load
Timing parameters are discussed further in the following sections.
Содержание IDT Tsi576
Страница 1: ...IDT Tsi576 Serial RapidIO Switch User Manual June 6 2016 Titl...
Страница 20: ...About this Document 20 Tsi576 User Manual June 6 2016 Integrated Device Technology www idt com...
Страница 34: ...1 Functional Overview JTAG Interface 34 Tsi576 User Manual June 6 2016 Integrated Device Technology www idt com...
Страница 102: ...4 Internal Switching Fabric Packet Queuing 102 Tsi576 User Manual June 6 2016 Integrated Device Technology www idt com...
Страница 230: ...11 Signals Pinlist and Ballmap 230 Tsi576 User Manual June 6 2016 Integrated Device Technology www idt com...
Страница 506: ...B Clocking P_CLK Programming 506 Tsi576 User Manual June 6 2016 Integrated Device Technology www idt com...
Страница 528: ...Index 528 Tsi576 User Manual June 6 2016 Integrated Device Technology www idt com...