Protection; Hardware Protection; Table 17.12 Hardware Protection - Renesas H8SX/1500 Series Hardware Manual

32-bit cisc microcomputer

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Protection

There are three types of protection against the flash memory programming/erasing: hardware

protection, software protection, and error protection.

Programming and erasure of the flash memory is forcibly disabled or suspended by hardware

protection. In this state, download of an on-chip program and initialization are possible. However,

programming or erasure of the user MAT cannot be performed even if the programming/erasing

program is initiated, and the error in programming/erasing is indicated by the FPFR parameter.

Reset protection

The programming/erasing interface

registers are initialized in the reset

state (including a reset by the WDT)

and the programming/erasing

protection state is entered.

The reset state will not be entered by

a reset using the RES pin unless the

RES pin is held low until oscillation has

settled after a power is initially

supplied. In the case of a reset during

operation, hold the RES pin low for the

RES pulse width given in the AC

characteristics. If a reset is input during

programming or erasure, data in the

flash memory is not guaranteed. In this

case, execute erasure and then

execute programming again.

Section 17 Flash Memory (0.18-(m F-ZTAT Version)

Function to be Protected

Rev. 3.00 Mar. 14, 2006 Page 623 of 804

Programming/

REJ09B0104-0300

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