HD6473847RHV Datasheet, PDF (207/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

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 6.20 Stipulated Transition Times to Command Wait State
Item
Symbol Min
Oscillation stabilization time t_osc1
10
(crystal resonator)
Oscillation stabilization time
5
(ceramic resonator)
Programmer mode setup t
10
bmv
time
V_CC hold time
t_dwn
0
Max
—
—
—
—
Unit
Test Condition
ms
Figure 6.20
ms
ms
ms
V_CC
t_osc1
t_bmv
Auto-program mode
Auto-erase mode
t_dwn
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 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. 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. 08, 2010 Page 175 of 510
REJ09B0024-0700