Configure Clocks

Versal ACAP Technical Reference Manual (AM011)

Document ID
AM011
Release Date
2022-04-26
Revision
1.4 English

Clocks are generated by the PMC and LPD clock controllers. The clock generators are described in System Perspective.

The I2C controller receives two clocks.

APB Programming Interface Clock

The APB programming interface is driven by the low-speed interconnect clock. Each register includes the three fields [SRCSEL], [DIVISOR], and [CLKACT].

Control registers:

  • PMC_I2C: PMC_LSBUS_CLK
  • LPD_I2C{0, 1}: LPD_LSBUS_CLK

Reference Clock

The reference clock is used for the controller logic, registers, and memories. It is also an input to the baud rate generator. Each I2C controller has its own reference clock that comes from the PMC or LPD clock generator. Each register includes the three fields [SRCSEL], [DIVISOR], and [CLKACT].

Clock control registers: