HD64F7047 datasheet(94/764 Pages) RENESAS

Part #	HD64F7047

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

PDF	764 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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94 / 764 page

Rev. 2.00, 09/04, page 54 of 720

4.2

Function for Detecting the Oscillator Halt

This CPG can detect a clock halt and automatically cause the timer pins to become high-

impedance when any system abnormality causes the oscillator to halt. That is, when a change of

EXTAL has not been detected, the high-current 12 pins (PE9/TIOC3B, PE11/TIOC3D,

PE12/TIOC4A, PE13/TIOC4B/

MRES, PE14/TIOC4C, PE15/TIOC4D/IRQOUT, PE16/PUOA/

UBCTRG*/A10, PE17/PVOA/WAIT/A11, PE18/PWOA/A12, PE19/PUOB/RxD4/ A13,

PE20/PVOB/TxD4/A14, PE21/PWOB/SCK4/A15) are set to high-impedance regardless of PFC

setting.

Even in standby mode, these 12 pins become high-impedance regardless of PFC setting. These

pins enter the normal state after standby mode is released. When abnormalities that halt the

oscillator occur except in standby mode, other LSI operations become undefined. In this case, LSI

operations, including these 12 pins, become undefined even when the oscillator operation starts

again.

Note: * For flash version only

HD64F7047 Datasheet(PDF) 94 Page - Renesas Technology Corp