2.1.3 LPD-Q configuration parameters

There are multiple configuration parameters that configure or modify the functionality of the Low Power Distributor Q-Channel.

The following table shows the LPD-Q configuration parameters.

Table 2-1 LPD-Q configuration parameters

Parameter Possible settings Default Description
SEQUENCER 0, 1 0

0 = The LPD-Q operates as an expander.

1 = The LPD-Q operates as a sequencer.

NUM_QCHL 2-32 2 Sets the number of device (dev_*) Q-Channel interfaces in the LPD-Q.
CTRL_Q_CH_SYNC 0, 1 1

0 = A synchronizer is not present on the ctrl_qreqn_i input.

1 = A synchronizer is present on the ctrl_qreqn_i input.

DEV_Q_CH_SYNC 0, 1 1

0 = Synchronizers are not present on the dev_qacceptn_i[N] or dev_qdeny_i[N] inputs.

1 = Synchronizers are present on the dev_qacceptn_i[N] and dev_qdeny_i[N] inputs.

ACTIVE_DENY 0, 1 1

0 = Support for denying a quiescence request by using dev_qactive_i[N] is not included.

1 = Support for denying a quiescence request using dev_qactive_i[N] is included. Synchronizers are included on the dev_qactive_i[N] inputs, where these signals are used internally.

Note:

The path from a device to the controller QACTIVE is combinatorial, irrespective of whether synchronizers are present.
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