Renesas H8S/2318 series, Hardware Manual

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Rev. 5.00, 12/03, page 606 of 1088
17.11.9 Programmer Mode Transition Time
Commands cannot be accepted during the oscillation stabilization period or the progremmer mode
setup period. After the progremmer mode setup time, a transition is made to memory read mode.
Table 17-24 Command Wait State Transition Time Specifications
Item Symbol Min Max Unit
Standby release (oscillation
stabilization time) t
osc1
30 — ms
Programmer mode setup time t
bmv
10 — ms
V
CC
hold time t
dwn
0 — ms
V
CC
RES
FWE
Memory read
mode
Command
wait state
Command
wait state
Normal/
abnormal end
identification
Auto-program mode
Auto-erase mode
t
osc1
t
bmv
t
dwn
Note: Except in auto-program mode and auto-erase mode, drive the FWE input pin low.
Figure 17-29 Oscillation Stabilization Time, Programmer Mode Setup Time, and Power
Supply Fall Sequence
17.11.10 Notes on Memory Programming
•
When programming addresses which have previously been programmed, carry out auto-
erasing before auto-programming.
•
When performing programming using PROM mode on a chip that has been
programmed/erased in an on-board programming mode, auto-erasing is recommended before
carrying out auto-programming.
Notes: 1. The flash memory is initially in the erased state when the device is shipped by Renesas
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.