OL2385 datasheet(42/85 Pages) NXP

42 / 85 page

OL2385

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Product data sheet

COMPANY PUBLIC

Rev. 1.0 — 15 June 2016

42 of 85

NXP Semiconductors

OL2385

Industrial RF transceiver

9.7 Device modes

The device features the following Device Modes:

• INIT

• PROTECTED

• TAMPERED

• VIRGIN

The Device Modes affect the overall device behavior, the Monitor and Download Interface

operation and the user ability to access the EROM.

A Device Mode is controlled by a set of configuration bytes, which are located in the

EROM.

The configuration bytes may not be altered by the user directly, instead, the

corresponding Monitor and Download command has to be used.

9.7.1 INIT

When the device is supplied from NXP, it is configured in INIT mode by default.

The INIT mode shall be used during software development only. The Monitor and

Download Interface is fully operational, enabling the customer to initialize the EROM as

desired for the application.

To protect the EROM from readout and to disable the debug features, the device shall be

forced into PROTECTED mode.

Leaving the device in INIT mode may cause the device to execute a software break, in

case a corresponding debug command is received at pin MSDA. This would terminate

execution of the application program and would call the built-in debug program. In this

case, execution of the application program is interrupted until a proper debug command is

issued or a device reset is applied.

9.7.2 PROTECTED

In the moment the device is set into PROTECTED mode, the EROM is protected against

altering and readout via the Monitor and Download Interface, and the debug features are

disabled. The PROTECTED mode has to be used during system testing and in the final

application.

The device may be forced into INIT mode again by issuing a corresponding command via

the Monitor and Download Interface. This command sets the EROM to a predefined state

before the INIT mode is resumed. Hence, the EROM based application program is

discarded. In case this sequence does not complete successfully, the device enters

TAMPERED mode.

9.7.3 TAMPERED

The TAMPERED mode is entered temporarily during the sequence that forces the device

from PROTECTED mode back into INIT mode. If this sequence does not complete

successfully, the TAMPERED mode is entered.

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