Program-Verify Mode - Renesas H8 Series Hardware Manual

8-bit single-chip microcomputer

Hide thumbs Also See for H8 Series:

Table of Contents

Section 6 ROM

Program-Verify Mode

In program-verify mode, the data written in program mode is read to check whether it has been

correctly written in the flash memory.

After the elapse of the programming time, exit programming mode (clear the P bit to 0) and select

program-verify mode (set the PV bit to 1). In program-verify mode, a program-verify voltage is

applied to the memory cells at the latched address. If the flash memory is read in this state, the

data at the latched address will be read. After selecting program-verify mode, wait at least 4 µs

before reading, then compare the programmed data with the verify data. If they agree, exit

program-verify mode and program the next address. If they do not agree, select program mode

again and repeat the same program and program-verify sequence. Do not repeat the program and

program-verify sequence more than six times* for the same bit.

Note: * When a bit is programmed repeatedly, set a loop counter so that the total programming

time will not exceed 1 ms.

Rev. 6.00 Sep 12, 2006 page 128 of 526

REJ09B0326-0600