A31316 datasheet(48/61 Pages) ALLEGRO

48 / 61 page

3D Magnetic Position Sensor IC

A31316

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

EE_MARGIN_RESULT (BIT 5) RO (READ ONLY)

Indicates which limit the margin failed. When the margin testing

fails, this bit is set based on the fail condition.

• If ee_margin_result = ‘0’, Lower margin failed

• If ee_margin_result = ‘1’, Upper margin failed

EE_MARGIN_STATUS (BITS 4:3) RO

Indicates the current status of margin testing.

• If ee_margin_status = ‘00’, Test has not been run

• If ee_margin_status = ‘01’, Test has passed

• If ee_margin_status = ‘10’, Test has failed

• If ee_margin_status = ‘11’, Test is currently running

EE_MARGIN_MIN_DIS (BIT 2) R/W

Determines if the low margin testing will be performed or

skipped.

• If ee_margin_min_dis = ‘0’, Lower margin testing will be

performed when margin testing is run.

• If ee_margin_min_dis = ‘1’, Lower margin testing will not be

performed when margin testing is run.

EE_MARGIN_MAX_DIS (BIT 1) R/W

Determines if the high margin testing will be performed or

skipped.

• If ee_margin_max_dis = ‘0’, Upper margin testing will be

performed when margin testing is run.

• If ee_margin_max_dis = ‘1’, Upper margin testing will not be

performed when margin testing is run.

EE_MARGIN_START (BIT 0) R/W

Write to ‘1’ to begin the margin testing. This bit self-clears when

the margin testing finishes. If cleared during testing, the test will

end prematurely.

Volatile 0x85

LBIST_RESULT (BIT 5) RO

Indicates whether LBIST has passed or failed when run.

• If lbist_result = ‘0’, LBIST test failed

• If lbist_result = ‘1’, LBIST test passed

LBIST_STATUS (BIT 4) RO

Indicates when BIST test is finished.

• If lbist_status = ‘0’, BIST is not finished or not started

• If lbist_status = ‘1’, BIST has finished and lbist_result

contains valid results.

Volatile 0x86

MEMORY_ACCESS (BIT 1) RO

Set to ‘1’ when access code is successfully sent.

Volatile 0xA0

MANCH_EN (BIT 7) R/W

Disables the current device output and forces Manchester inter-

face to be active.

• If manch_en = ‘0’, Device is in normal operation mode and

will output based on EEPROM settings

• If manch_en = ‘1’, Device output is in High-Z mode, and

Manchester is active and waiting for commands.

Volatile 0xA1

LBIST_START (BITS 32:0) RO

Contains the calculated LBIST signature. This is internally

compared against the expected value to determine if there are any

internal logic failures.

Volatile 0xA3

OFE (BIT: 12) RO

Indicates when the oscillator frequency error has occurred. This

bit will NOT be asserted if the flag is masked.

SPE (BIT: 11) RO

Indicates when the shadow parity error has occurred. This bit will

NOT be asserted if the flag is masked.

EUE (BIT: 10) RO

Indicates when the EEPROM uncorrectable error has occurred.

This bit will NOT be asserted if the flag is masked.

OVCC (BIT: 9) RO

Indicates when the OVD error has occurred. This bit will NOT be

asserted if the flag is masked.

A31316 Datasheet(PDF) 48 Page - Allegro MicroSystems

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