Programmer Mode Transition Time; Notes On Memory Programming - Renesas H8 Series Hardware Manual

Section 6 ROM
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
Oscillation stabilization time(crystal oscillator)
Oscillation stabilization time(ceramic oscillator)
Programmer mode setup time
Vcc hold time
Vcc
RES
Figure 6.20 Oscillation Stabilization Time, Boot Program Transfer Time,
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.
Rev. 7.00 Mar 10, 2005 page 188 of 652
REJ09B0042-0700
t t
osc1 bmv
and Power-Down Sequence
Symbol Min Max
T 10 —
osc1
T 5 —
osc1
T 10 —
bmv
T 0 —
dwn
Auto-program mode
Auto-erase mode
Unit Notes
ms Figure 6.20
ms
ms
ms
t
dwn