HD6473032F16 Datasheet, PDF (636/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 18 ROM
Programming
Wait and erase
time: x possible
Programming
and
Programming
Wait erase Wait and erase
time: x possible time: x possible
Programming
Wait and erase
time: x possible
φ
V_CC
FWE
t_OSC1
t_MDS
Min 0 µs
t_H
t_MD^*_S2
MD₂ to MD₀
t_MDS
t_RESW
RES
SWE1 (2) bit
SWE1 (2) set
SWE1 (2) clear
Mode switching^*1 Boot mode Mode
User
switching^*1 mode
User program mode
Flash memory access disabled time
(x: Wait time after SWE1 (2) setting)^*3
Flash memory reprogammable period
(Flash memory program execution and data read, other than verify, are disabled.)
User
mode
User
program
mode
Notes: 1. In transition to the boot mode and transition from the boot mode to another mode, mode switching via RES
input is necessary.
During this switching period (period during which a low level is input to the RES pin),the state of the address
dual port and bus control output signals (AS, RD, WR) changes.
Therefore, do not use these pins as output signals during this switching period.
2. When making a transition from the boot mode to another mode, the mode programming setup time t_MDS relative
to the RES clear timing is necessary.
3. See 21.2.5 Flash Memory Characteristics.
Figure 18.20 Mode Transition Timing
(Example: Boot mode → User mode ↔ User program mode)
Rev. 3.00 Mar 21, 2006 page 606 of 814
REJ09B0302-0300