HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 488

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 17 ROM
4. Page programming mode cannot be used. Always set the equipment to byte programming
5. The capacity of the on-chip ROM is 64 kbytes, so the data of PROM programmer addresses
6.
17.3.4
After programming, it is recommended that the device be left to stand at a high temperature to
increase the reliability of data retention. Letting it stand at a high temperature is a type of
screening method that can eliminate of initial data retention defects of the on-chip PROM's
memory cells within a short period of time. Figure 17.6 shows the flow from programming of the
on-chip PROM, including screening, to mounting on the device board.
If abnormalities are found when the program is written and verified or the program is read and
checked after writing/verification or letting the chip stand at high temperature, contact Renesas'
engineering department.
Rev. 7.00 Jan 31, 2006 page 462 of 658
REJ09B0272-0700
mode.
H'10000–H'1FFFF should be H'FF. Always set the range for PROM addresses to H'0000–
H'FFFF.
When write errors occur on consecutive addresses, stop writing. Check to see if there are any
abnormalities in the EPROM programmer and socket adapter.
Reliability after Writing
high temperature environment
Let stand in nonconductive,
(125–150 C, 24–48 hours)
Data read and verification
Writing and verification
Mount on board
(V
Figure 17.6 Screening Flow
of program
CC
= 5.0 V)
Flowchart
from figure 17.4