Freescale Semiconductor MCF5480 - Manual (Page 625)

Channels
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor 22-23
Table 22-14. CCPSRLn Field Descriptions
Bits Name Description
31–27 — Reserved, set to zero
26 STAT Crypto-Channel Static Mode Enable. The STAT bit is set when descriptor processing is
initiated and the EUs indicated in the descriptor header register are already assigned to the
channel. This bit is cleared when descriptor processing is initiated for the next descriptor and
no EUs are assigned to the channel.
0 Crypto-channel is operating in dynamic mode.
1 Crypto-channel is operating in static mode.
25 Multi_EU_IN Multi_EU_IN. Reflects the type of snooping the channel will perform, as programmed by the
“Snoop Type” bit in the descriptor header.
0 Data input snooping by secondary EU disabled.
1 Data input snooping by secondary EU enabled.
24 Multi_EU_OUT Multi_EU_OUT. Reflects the type of snooping the channel will perform, as programmed by the
“Snoop Type” bit in the descriptor header.
0 Data output snooping by secondary EU disabled.
1 Data output snooping by secondary EU enabled.
23 PR Primary request. Request primary EU assignment.
0 Primary EU Assignment Request is inactive.
1 The crypto-channel is requesting assignment of primary EU to the channel. The channel
will assert the EU request signal indicated by the PEUSEL field in the descriptor header as
long as this bit remains set.
The PR bit is set when descriptor processing is initiated in dynamic mode and the PEUSEL
field in the descriptor header contains a valid EU identifier. This bit is cleared when the request
is granted, which will be reflected in the status register by the setting the PG bit.
22 SR Secondary request. Request secondary EU assignment.
0 Secondary EU Assignment Request is inactive.
1 The crypto-channel is requesting assignment of secondary EU to the channel. The channel
will assert the EU request signal indicated by the SEUSEL field in the descriptor header
register as long as this bit remains set.
The SR bit is set when descriptor processing is initiated in dynamic mode and the SEUSEL
field in the descriptor header contains a valid EU identifier. This bit is cleared when the request
is granted, which will be reflected in the status register by the setting the SG bit.
21 PG Primary EU granted. Reflects the state of the EU grant signal for the requested primary EU
from the controller.
0 The primary EU grant signal is inactive.
1 The EU grant signal is active indicating the controller has assigned the requested primary
EU to the channel.
20 SG Secondary EU granted. Reflects the state of the EU grant signal for the requested secondary
EU from the controller.
0 The secondary EU grant signal is inactive.
1 The EU grant signal is active indicating the controller has assigned the requested
secondary EU to the channel.
19 PRD Primary EU reset done. Reflects the state of the reset done signal from the assigned primary
EU.
0 The assigned primary EU reset done signal is inactive.
1 The assigned primary EU reset done signal is active indicating its reset sequence has
completed and it is ready to accept data.