SH7049 datasheet(4/764 Pages) RENESAS

Part #	SH7049

Description	Renesas 32-Bit RISC Microcomputer SuperHTMRISC engine Family/SH7000 Series

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Manufacturer	RENESAS [Renesas Technology Corp]

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4 / 764 page

Rev. 2.00, 09/04, page iv of xl

General Precautions on Handling of Product

1. Treatment of NC Pins

Note:

Do not connect anything to the NC pins.

The NC (not connected) pins are either not connected to any of the internal circuitry or are

they are used as test pins or to reduce noise. If something is connected to the NC pins, the

operation of the LSI is not guaranteed.

2. Treatment of Unused Input Pins

Note:

Fix all unused input pins to high or low level.

Generally, the input pins of CMOS products are high-impedance input pins. If unused pins

are in their open states, intermediate levels are induced by noise in the vicinity, a pass-

through current flows internally, and a malfunction may occur.

3. Processing before Initialization

Note:

When power is first supplied, the product’s state is undefined.

The states of internal circuits are undefined until full power is supplied throughout the

chip and a low level is input on the reset pin. During the period where the states are

undefined, the register settings and the output state of each pin are also undefined. Design

your system so that it does not malfunction because of processing while it is in this

undefined state. For those products which have a reset function, reset the LSI immediately

after the power supply has been turned on.

4. Prohibition of Access to Undefined or Reserved Addresses

Note:

Access to undefined or reserved addresses is prohibited.

The undefined or reserved addresses may be used to expand functions, or test registers

may have been be allocated to these addresses. Do not access these registers; the system’s

operation is not guaranteed if they are accessed.

Precaution on Handling HCAN2

Restrictions apply to the use of the HCAN2. Carefully read section 15.8, Usage Notes,

beforehand.

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