H838024 datasheet(217/697 Pages) RENESAS

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Section 6 ROM

Rev. 7.00 Mar 10, 2005 page 175 of 652

REJ09B0042-0700

6.9.3

Error Protection

In error protection, an error is detected when CPU runaway occurs during flash memory

programming/erasing, or operation is not performed in accordance with the program/erase

algorithm, and the program/erase operation is aborted. Aborting the program/erase operation

prevents damage to the flash memory due to overprogramming or overerasing.

When the following errors are detected during programming/erasing of flash memory, the FLER

bit in FLMCR2 is set to 1, and the error protection state is entered.

• When the flash memory of the relevant address area is read during programming/erasing

(including vector read and instruction fetch)

• Immediately after exception handling excluding a reset during programming/erasing

• When a SLEEP instruction is executed during programming/erasing

The FLMCR1, FLMCR2, and EBR settings are retained, however program mode or erase mode is

aborted at the point at which the error occurred. Program mode or erase mode cannot be re-entered

by re-setting the P or E bit. However, PV and EV bit setting is enabled, and a transition can be

made to verify mode. Error protection can be cleared only by a power-on reset.

6.10

Programmer Mode

In programmer mode, a PROM programmer can be used to perform programming/erasing via a

socket adapter, just as a discrete flash memory. Use a PROM programmer that supports the MCU

device type with the on-chip Renesas Technology (former Hitachi Ltd.) 64-Kbyte flash memory

(F-ZTAT64V3). A 10-MHz input clock is required. For the conditions for transition to

programmer mode, see table 6.7.

6.10.1

Socket Adapter

The socket adapter converts the pin allocation of the HD64F38024, HD64F38024R,

HD64F38124, and HD64F38122 to that of the discrete flash memory HN28F101. The address of

the on-chip flash memory is H'0000 to H'7FFF. Figure 6.12(1) shows a socket-adapter-pin

correspondence diagram of the HD64F38024 and HD64F38024R. Figure 6.12(2) shows a socket-

adapter-pin correspondence diagram of the HD64F38124 and HD64F38122.

H838024 Datasheet(PDF) 217 Page - Renesas Technology Corp