NXP Semiconductors MWCT101 S Series, Reference Manual

Page: 439 / 1761

19.3.4.2 Function
The first word of the Error Injection Channel Descriptor defines a left-justified mask
field: CHKBIT_MASK. Each bit of CHKBIT_MASK specifies whether the
corresponding bit of the checkbit bus from the target RAM should be inverted or remain
unmodified on read accesses. Successful write to this field clears the corresponding error
injection channel valid bit, EICHEN[EICHnEN].
19.3.4.3 Diagram
Bits 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
CHKBIT_MASK
0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R 0
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
19.3.4.4 Fields
Field Function
31-25
CHKBIT_MASK
Checkbit Mask
This field defines a bit-mapped mask that specifies whether the corresponding bit of the checkbit bus
from the target RAM should be inverted or remain unmodified.
For any unique details about the mapping of CHKBIT_MASK's bits to a channel's target RAM, see the
chip-specific EIM information.
The following table shows the width and bit range of CHKBIT_MASK for each channel.
Channel CHKBIT_MASK width (bits) CHKBIT_MASK bit range
0 7 6-0
1 7 6-0
NOTE: Because CHKBIT_MASK is left-justified, the highest bit in the bit range is always in the position
of the most significant bit. For a CHKBIT_MASK that is 7 bits wide, CHKBIT_MASK[6] is in the
position of the most significant bit. For any CHKBIT_MASK with a smaller width, the highest bit
in that width's bit range is in the position of the most significant bit.
0b - The corresponding bit of the checkbit bus remains unmodified.
Table continues on the next page...
Chapter 19 Error Injection Module (EIM)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 439