Dcf Client List - STMicroelectronics SPC572L series Reference Manual

Device Configuration Format (DCF) Records
include different write strategies listed below. The following list defines the special
strategies:
–
–
–
–
–
–
–
–
8.4.1

DCF client list

DCF address
DCF CS[14:0] [16:2]
(binary)
000_0000_00 00000000010
00_1000 1000
00000000010
000_0000_00 1000 –
00_1000 00000000010
1011
000_0000_00 00000000010
00_1000 1100
00000000010
000_0000_00 1101 –
00_1000 00000000010
1111
000_0000_00 00000000011
00_1000 0000
210/2058
None—no special DCF strategy is used.
Parity—not implemented for UTEST DCF clients. Used for TEST Only DCF clients
not accessible to the user.
Write Once—a DCF client can only be written once. The DCF client ignores
subsequent writes.
Triple Voted—DCF clients have three copies of the register. The SSCM writes to
all three registers in a single write cycle. The outputs of the three registers are
majority voted together to determine the correct data value. Triple voting allows for
'bit-flip' error tollerance without changing the DCF client output data.
Triple Voted with second write—as per 'Triple Voted' but during the second
execution of Phase 3 of the reset sequence, the SSCM attempts to write the DCF
client again and the DCF client checks that the register contains the same data.
Write 0 only—a bit in a DCF client can only be written from a logic 1 to a logic 0.
An attempt to write a logic 1 is ignored.
Write 1 only—a bit in a DCF client can only be written from a logic 0 to a logic 1.
An attempt to write a logic 0 is ignored.
DCF order dependency in flash memory—this column details whether or not there
are special conditions on the location of a particular DCF record in flash memory.
Table 71. DCF client list
DCF client
description
Life Cycle
(LCSTAT)
Censorship
DocID027809 Rev 4
(1)
Reset Typical
IPS read
value of value of
direct
DCF DCF
access
client client
PASS
0x00FF — yes
Reserved
0x55AA — yes
Reserved
Reserved
RM0400
Estimat
DCF DCF
client order UTEST
specia dependen flash
l cy memor
strateg in flash
y memory space
(bytes)
Write
None
'0' only
None None
ed
y
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