3.2.2. Control field, MBIR[39:34]

The control field specifies the MBIST function. Table 3.3 shows how the control field affects the behavior of the L220 MBIST Controller.

Table 3.3. Control field encoding

Control MBIR[39:34]BehaviorDescription
bx00000Default

Test runs to completion. If MBIR[39] = 0, sticky fail present after first failure.

bx00001Stop on failEnd of test on failure.
bx00011Bitmap modeEnables logging of each failure. See Bitmap mode.

MBIR[39] selects a nonsticky or sticky fail flag, MBISTRESULT[1]:

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