HD64F3039F18 Datasheet, PDF (517/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 15 ROM
Wait Programming and
time: x erase possible
Programming
and
Wait erase Wait Programming and
time: x possible time: x erase possible
Programming
and
Wait erase
time: x possible
φ
V_CC
t_OSC1
Min 0 µs
FWE
MD₂ to MD₀
RES
t_MDS
t_MDS
t_MDS^*2
t_RESW
SWE bit
SWE set
SWE clear
Mode switching^*1
Boot mode Mode
User
switching^*1 mode
User program mode
: Flash memory access disabled time
(x: Wait time after SWE 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 tMDS relative
to the RES clear timing is necessary.
3. See section 18.2.5, Flash Memory Characteristics.
Figure 15.27 Mode Transition Timing
(Example: Boot Mode → User Mode ↔ User Program Mode)
Rev.3.00 Mar. 26, 2007 Page 493 of 682
REJ09B0353-0300