Renesas SH7046 Series Uživatelský manuál stáhnout pdf (Strana 2)

Date: Apr.28.2005

RENESAS TECHNICAL UPDATE

Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda -ku, Tokyo 100-0004, Japan

RenesasTechn ology Corp.

Product

Category

Technical Notification

Lot No.

Applicable

Product

SH7046 Series, SH7047 Series, SH7104,

SH7105, SH7106, SH7107, SH7108, and

SH7109 All lots

Reference

Document

SH7046 Series Hardware Manual

(ADE-602-237B Rev. 3.0)

SH -2 SH7047 Group Hardware Manual

(REJ09B0020-0200Z Rev. 2.0 )

Thank you for your consistent patronage of Renesas semiconductor products.

We would like to inform you of the following restrictions on the dead time of the motor management timer (MMT) in the

SH7046 Series, SH7047 Series, SH7104, SH7105, SH7106, SH7107, SH7108, and SH7109.

1. Phenomenon

A PWM waveform output may have a shorter dead time (no n-overlap time) than the time specified by the timer dead time

Note:* The same error is observed for the PVOA and PVOB pins or the PWOA and PWOB pins.

2. Conditions

This error occurs when the counter is restarted (setting the CST bit in TCNR to 1) after the counter is stopped by clearing the

CST bit in TCNR to 0 while the MMT repeats count up and count dow n.

Dead time as specified

PUOA*

Normal output waveform

PUOB*

Shorter dead time than specified

PUOA*

Output waveform when this error observed

PUOB*

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Renesas SH7046 Series Uživatelský manuál Strana 2