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Usage Notes and Known Design Exceptions to Functional Specifications

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Advisory HWBIST: C28x HWBIST Should Not be Used

Revision(s) Affected 0, A, B

Details Using the HWBIST feature on the C28x CPU can cause unpredictable behavior in the

C28x subsystem.

The HWBIST feature on Cortex-M3 is supported with no issues.

Workaround(s) None. The C28x HWBIST should not be used on the revisions affected.

Advisory Crystal: Maximum Equivalent Series Resistance (ESR) Values are Reduced

Revision(s) Affected 0, A, B

Details The maximum ESR values are reduced. For the revisions affected, the data in Table 6

supersedes the data given in the "Crystal Equivalent Series Resistance (ESR)

Requirements" table in the F28M35H52C, F28M35H22C, F28M35M52C, F28M35M22C,

F28M35M20B, F28M35E20B Concerto Microcontrollers Data Manual (SPRS742). The

differences between the two tables are highlighted in Table 6.

Table 6. Crystal Equivalent Series Resistance (ESR) Requirements

(1)

MAXIMUM ESR (Ω) MAXIMUM ESR (Ω)

CRYSTAL FREQUENCY (MHz)

(CL1/2 = 12 pF) (CL1/2 = 24 pF)

2 175 375

4 100 195

6 75 145

8 65 105

10 55 70

12 50 45

14 50 35

16 45 25

18 40 20

20 30 15

(1)

Crystal shunt capacitance (C0) should be less than or equal to 7 pF.

Workaround(s) None

F28M35x Concerto™ MCU Silicon Errata SPRZ357J–August 2011–Revised July 2014

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MAP electronics Cocerto-B Spezifikationen Seite 18