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Section 6 ROM
Rev. 6.00 Sep 12, 2006 page 109 of 526
REJ09B0326-0600
Figure 6.4 shows a PROM write/verify timing diagram.
Address
Data
V
PP
V
CC
CE
OE
V
PP
V
CC
V
CC
V
CC
Write
Verify
Input data
Output data
t
AS
t
DS
t
VPS
t
VCS
t
PW
t
OPW
*
t
DH
t
OES
t
OE
t
DF
t
AH
Note:
*
t
OPW
is defined by the value given in figure 6.3, High-Speed, High-Reliability Programming
Flow
Chart.
+1
Figure 6.4 PROM Write/Verify Timing
6.3.2 Programming
Precautions
•
Use the specified programming voltage and timing.
The programming voltage in PROM mode (V
PP
) is 12.5 V. Use of a higher voltage can
permanently damage the chip. Be especially careful with respect to PROM programmer
overshoot.
Setting the PROM programmer to Renesas Technology specifications for the HN27C256 will
result in correct V
PP
of 12.5 V.
•
Make sure the index marks on the PROM programmer socket, socket adapter, and chip are
properly aligned. If they are not, the chip may be destroyed by excessive current flow. Before
programming, be sure that the chip is properly mounted in the PROM programmer.
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...