Renesas H8 Series Hardware Manual

Section 6 ROM
Rev. 7.00 Mar 10, 2005 page 188 of 652
REJ09B0042-0700
6.10.8 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 6.22 Stipulated Transition Times to Command Wait State
Item Symbol Min Max Unit Notes
Oscillation stabilization time(crystal oscillator) T
osc1
10 — ms Figure 6.20
Oscillation stabilization time(ceramic oscillator) T
osc1
5—ms
Programmer mode setup time T
bmv
10 — ms
Vcc hold time T
dwn
0—ms
t
osc1
t
bmv
t
dwn
Vcc
R
ES
Auto-program mode
Auto-erase mode
Figure 6.20 Oscillation Stabilization Time, Boot Program Transfer Time,
and Power-Down Sequence
6.10.9 Notes on Memory Programming
1. 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.
2. 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.

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English