AS8220 datasheet(18/34 Pages) AMSCO

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Revision 17920-001-10a

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AS8220A

Objective Data Sheet - Detailed Description

High current on BM high side driver

This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable

Data0 longer than tBUS_ERROR. If the absolute value of the BM pin current is higher than ITHH after tBUS_ERROR since

the driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.

High current on BM low side driver

This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable

Data1 longer than tBUS_ERROR. If the absolute value of the BM pin current is higher than ITHH after tBUS_ERROR since

the driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.

BP open line

This flag is the logical “AND” between: low current on BP high side and low current on BP low side.

BM open line

This flag is the logical “AND” between: low current on BM high side and low current on BM low side.

BP short circuit to VCC

This flag is the logical “AND” between: low current on BP high side and high current on BP low side.

BP short circuit to GND

This flag is the logical “AND” between: high current on BP high side and low current on BP low side.

BM short circuit toVCC

This flag is the logical “AND” between: low current on BM high side and high current on BM low side.

BM short circuit to GND

This flag is the logical “AND” between: high current on BM high side and low current on BM low side.

Short circuit between BP and BM

This flag can only be set or reset in NORMAL mode when the driver is enabled. After a time tBUS_ERROR since TxD

edge if the absolute value of the differential bus voltage is lower than VSHORT then the flag is set otherwise it is reset.

he flag is reset at power off.

Over temperature

This flag can only be set or reset in the non low power modes. The flag is set when the junction temperature exceeds

OTTH and it is reset when the junction temperature falls below OTTL.

TxEN_BGE timeout

This flag can only be set in NORMAL mode when the driver is enabled (TxEN is low and BGE is high) for a time longer

than tTxEN_max. It is reset every transition on TxEN or BGE or if the device exits NORMAL mode. If the flag is set the

driver is disabled.

Error flag

This flag is set if at least one error flag or if VIO flag is set and it is reset if none of the previous flag is set.

Status Flags Description

Power on flag

The power on flag is set leaving the power off state and it is reset entering a low power mode after a non low power

mode.

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