HD6432621 Hitachi, HD6432621 Datasheet - Page 687

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

(X')
0
1
Legend
(Y): Data of bits on which additional programming is executed
(X'): Data of bits on which reprogramming is executed in a certain reprogramming loop
7. It is necessary to execute additional programming processing during the course of the
Additional-Programming Data Computation Table
H8S/2626 or H8S/2623 program/program-verify procedure. However, once 128-byte-unit
programming is finished, additional programming should not be carried out on the same
address area. When executing reprogramming, an erase must be executed first. Note that
normal operation of reads, etc., is not guaranteed if additional programming is performed on
addresses for which a program/program-verify operation has finished.
Result of Verify-Read
after Write Pulse
Application (V)
0
1
0
1
Result of Operation
0
1
(Y)
Comments
Programming by write pulse application
judged to be completed: additional
programming processing to be executed
Programming by write pulse application
incomplete: additional programming
processing not to be executed
Programming already completed: additional
programming processing not to be executed
Still in erased state: no action
643