Programmer Mode Transition Time; Notes On Memory Programming - Renesas Hitachi H8S/2194 Series Hardware Manual

7.8.9

Programmer Mode Transition Time

Commands cannot be accepted during the oscillation stabilization period or the programmer
mode setup period. After the programmer mode setup time, a transition is made to memory read
mode.
Table 7.20 Command Wait State Transition Time Specifications
Item
Standby release
(oscillation stabilization time)
Programmer mode setup time
V hold time
CC
V
t
CC
osc1
RES
FWE
Note: Except in auto-program mode and auto-erase mode, drive the FWE input pin low.
Boot Program Transfer Time, and Power Supply Fall Sequence
7.8.10

Notes On Memory Programming

(1) When programming addresses which have previously been programmed, carry out auto-
erasing before auto-programming.
(2) When performing programming using programmer 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
Hitachi. 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.
2. Auto-programming should be performed once only on the same address block.
Rev. 2.0, 11/00, page 166 of 1037
Symbol
t
osc1
t
bmv
t
dwn
t
bmv
Memory read
mode
Command wait
state
Figure 7.23 Oscillation Stabilization Time,
Min
10
10
0
Auto-program mode
Auto-erase mode
Max Unit

ms

ms

ms
t
dwn
Command
Don't care
wait state
Normal/abnormal
end identifica-
tion
Don't care