STMicroelectronics SPC572L series Reference Manual page 691

RM0400 Error Injection Module (EIM)
The EIM supports up to 4 error injection channels, where each channel is assigned to a
single memory array interface. Each EIM channel intercepts the assigned memory read
data and checkbit bus and potentially inverts the value tranmitted on each bus line as
defined by EICHDn.WORD0-2. On a memory read access, the read data and checkbit bus
is intercepted by the EIM and the appropriate bits of the read data and/or checkbit bus are
inverted, injecting error(s), as defined by EICHDn.WORD0-2. Figure 297 depicts the
interception and override of the read data and checkbit data bus for a memory array.
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