Miscellaneous registers (Misc)
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Doc ID 018672 Rev 1
12.4.26 COMPSSTL_1V8_CFG/DDR_2V5_COMPENSATION register
The COMPSSTL_1V8_CFG/DDR_2V5_COMPENSATION is R/W registers which configure
the internal SSTL compensation cells parameters. The register bit assignments is given in
the next table.
12.4.27 COMPCOR_3V3_CFG
register
The COMPCOR_3V3_CFG is a R/W register which configures the internal CORE
compensation cell parameters. The register bit assignments is given in the next table.
Table 180.
COMPSSTL_1V8_CFG/DDR_2V5_COMPENSATION register bit
assignments
COMPSSTL_1V8_CFG Register
0x0E4
Bit
Name
Reset Value Description
[31]
TQ
1’h0
It enables IDDq mode.
[30:24]
rasrc
7'h78
Writing code compensation parameter: field sampled from
the compensation macro-cell during Read operating mode
command (ref. Compensation cell operating mode table).
[23]
RFU
-
Reserved for future use (Write don’t care - Read return zeros)
[22:16]
nasrc
-
Read code compensation parameter (RO); this field is
qualified from ‘sts_ok’ active high.
[15:05]
RFU
-
Reserved for future use (Write don’t care - Read return
zeros).
[04]
COMPOK
1’h0
Valid code compensation (RO); field actives high in normal
mode when the measured code is available on the
compensation bus nasrc.
[03]
accurate
1’h1
Compensation cell internal/external reference resistance
definition:
1’b0: Internal reference resistor
1’b1: External reference resistor: used to improve the
accuracy of compensation code value.
[02]
freeze
1’h0
Freeze command: when high freezes the current calculated
value of compensation bus.
[01]
comptq
1’h0
Compensation cell internal command parameter (ref.
Compensation cell operating mode table)
[00]
compen
1’h0
Compensation cell internal command parameter (ref.
Compensation cell operating mode table).