Figure 18.2 Flash Memory State Transitions; Table 18.1 Differences Between Boot Mode And User Program Mode - Renesas H8S Series Hardware Manual

Figure 18.3 shows the operation flow for boot mode and figure 18.4 shows that for user program
mode.
User mode
(on-chip ROM
enabled)
FWE = 1
Notes: Only make a transition between user mode and user program mode when the CPU is
not accessing the flash memory.
1. RAM emulation possible
2. This LSI transits to programmer mode by using the dedicated PROM programmer.

Table 18.1 Differences between Boot Mode and User Program Mode

Total erase
Block erase
Programming control program *
(1) Erase/erase-verify
(2) Program/program-verify
(3) Emulation
Note: * To be provided by the user, in accordance with the recommended algorithm.
MD1 = 1,
MD2 = 1,
FWE = 0
* 1
RES = 0
MD1 = 1,
MD2 = 1,
FWE = 1
FWE = 0
* 1
User
program mode
On-board programming mode

Figure 18.2 Flash Memory State Transitions

Boot Mode
Yes
No
(2)
Reset state
* 2
RES = 0
MD2 = 0,
RES = 0
MD1 = 1,
FWE = 1
Boot mode
User Program Mode
Yes
Yes
(1) (2) (3)
Rev. 6.00 Mar 15, 2006 page 457 of 570
Section 18 ROM
RES = 0
Programmer
mode
REJ09B0211-0600