HD6432138SW datasheet(675/1061 Pages) RENESAS

675 / 1061 page

Section 21 ROM (Mask ROM Version, H8S/2138 F-ZTAT, H8S/2134 F-ZTAT, and H8S/2132 F-ZTAT)

Rev. 4.00 Jun 06, 2006 page 621 of 1004

REJ09B0301-0400

21.10.10

Notes on Memory Programming

• When programming addresses which have previously been programmed, carry out auto-

erasing before auto-programming.

• When performing programming using programmer mode on a chip that has been

programmed/erased in an on-board programming mode, auto-erasing is recommended before

carrying out auto-programming.

Notes: 1. The flash memory is initially in the erased state when the device is shipped by Renesas.

For other chips for which the erasure history is unknown, it is recommended that auto-

erasing be executed to check and supplement the initialization (erase) level.

2. Auto-programming should be performed once only on the same address block.

21.11

Flash Memory Programming and Erasing Precautions

Precautions concerning the use of on-board programming mode and programmer mode are

summarized below.

Use the specified voltages and timing for programming and erasing: Applied voltages in

excess of the rating can permanently damage the device. For a PROM programmer, use Renesas

Technology microcomputer device types with 128-kbyte or 64-kbyte on-chip flash memory that

support a 5.0 V programming voltage.

Do not select the HN28F101 or use a programming voltage of 3.3 V for the PROM programmer,

and only use the specified socket adapter. Incorrect use will result in damaging the device.

Powering on and off: When applying or disconnecting V

CC, fix the RES pin low and place the

flash memory in the hardware protection state.

The power-on and power-off timing requirements should also be satisfied in the event of a power

failure and subsequent recovery.

Use the recommended algorithm when programming and erasing flash memory: The

recommended algorithm enables programming and erasing to be carried out without subjecting the

device to voltage stress or sacrificing program data reliability. When setting the P or E bit in

FLMCR1, the watchdog timer should be set beforehand as a precaution against program runaway,

etc.

HD6432138SW Datasheet(PDF) 675 Page - Renesas Technology Corp