HD64F38024HV Datasheet, PDF (212/684 Pages) Renesas Technology Corp – Hardware Manual 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 6.22 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
Symbol Min
Tosc1
10
Tosc1
5
Tbmv
10
Tdwn
0
Max Unit Notes
—
ms
Figure 6.20
—
ms
—
ms
—
ms
tosc1
tbmv
Vcc
Auto-program mode
Auto-erase mode
tdwn
RES
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.
Rev. 8.00 Mar. 09, 2010 Page 190 of 658
REJ09B0042-0800