h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 750
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
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Section 20 ROM
20.11.9 Notes on Memory Programming
1. When programming addresses which have previously been programmed, carry out auto-
2. When performing programming using programmer mode on a chip that has been
Notes: 1. The flash memory is initially in the erased state when the device is shipped by Renesas
Rev. 5.00 Sep 22, 2005 page 724 of 1136
REJ09B0257-0500
erasing before auto-programming.
programmed/erased in an on-board programming mode, auto-erasing is recommended before
carrying out auto-programming.
FWE
RES
Note: When using other than the automatic write mode and automatic erase mode, drive the FWE
V
CC
Figure 20.25 Oscillation Stabilization Time, Boot Program Transfer Time, and
2. Auto-programming should be performed once only on the same address block.
input pin low.
Technology. 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.
Additional programming cannot be performed on previously programmed address
blocks.
t
osc1
t
bmv
Memory read
mode
Command
wait state
Power-Down Sequence
Auto-program mode
Auto-erase mode
Command wait state
Normal/abnormal
end decision
t
dwn
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