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AS8530

Datasheet - Application In form atio n

8.8 Control and Diagnosis Registers

The serial interface can be used as interface between the ASSP AS8530 and an external micro-controller. The interface is a slave and only the

micro-controller can start the communication. This interface will be used for device configuration, entering into test mode and carrying out

diagnostic options. Refer to Table 8 for details on the configuration registers.

8.8.1 Definition of Control and Status Registers

A total of 32 control, diagnosis and test registers, each of 8-bit can be accessed using the 2-wire serial interface. Table 8 provides a description

of all control and status registers.

Table 8. Configuration Registers

Address

Register Name

POR Value

RD / WR

Description

Control and Configuration Register

0 x 03

Device Configuration

Register

On POR_VCC

0000_1111

RD / WR

D0 Reserved

D1 Reserved

D2 Reserved

D3 Enable / Disable LIN Transceiver

0

Disabled

1

Enabled

D7…D4 Reserved

0 x 04

Device Control Register On POR_VSUP

0000_0001

RD / WR D7... D1 Reserved

0 x 05

Temporary Shutdown

Register

On POR_VCC

0000_0000

RD / WR

D0 Temporary shutdown control bit

0

No Temporary shutdown

1

Enter into Temporary shutdown

D7…D1 Reserved

0 x 06

Window Watch Dog

Trigger Register

On POR_VCC

0000_0000

WR

D0 Window Watch Dog Trigger

This bit will be set by MCU to indicate trigger event. If this trigger

occurs outside the Window of Watch dog counter, then RESET signal

is asserted. Also on this trigger WWD counter is restarted and this bit

will be cleared internally within 2 cycles of 128KHz clock.

D7 … D1 Reserved

0 x 07

Low Side Driver Data

Register

On POR_VCC

0000_0000

RD / WR D7 … D0 Reserved