L9908 datasheet(31/152 Pages) STMICROELECTRONICS

31 / 152 page

Figure 13. Self-test mode state machine (NORMAL MODE)

Note:

Self-Test procedure shall be activated only when the L9908 is supplied within its Functional Operating Range

otherwise the self-check may fail.

Two SPI readable flags are present in the register GEN_STATUS1 to read-back the BIST state machine activation

status according to the following table:

Table 22. Self-test procedure status bits

SELF_TEST_STATUS1

SELF_TEST _STATUS0

Description

SELF TEST stop

SELF TEST running

SELF TEST finished with NO Failure

SELF TEST finished with Failure

The self-test mode is left when procedure ends or after the Self-Test Time-out expiration: after accessing self-test

mode a timeout is started, when the timeout expires, it is aborted.

Note:

All parameters are guaranteed and tested in the voltage ranges reported in Table 5 unless otherwise specified.

Where not specified the parametrical operating range equals the functional operating range.

Table 23. Self-test timings and timeout

Symbol

Parameter

Min

Typ

Max

Unit

Notes

T_hwsc

Self-Test procedure duration

0.65

0.75

Not subject to production test

L9908

Functional description

DS13546 - Rev 5

page 31/152

L9908 数据表(PDF) 31 Page - STMicroelectronics

L9908 数据表(HTML) 31 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载