Rev. 1.0, 09/02, page 447 of 568
Boot mode
On-board programming mode
User
program mode
User mode
(on-chip ROM
enabled)
Reset state
Programmer
mode
= 0
FWE = 1
FWE = 0
*
1
*
1
*
2
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.
= 0
MD2 = 0
MD1 = 1,
FWE = 1
= 0
= 0
MD1 = 1,
MD2 = 1,
FWE = 0
MD1 = 1,
MD2 = 1,
FWE = 1
Figure 19.2 Flash Memory State Transitions
Table 19.1 Differences between Boot Mode and User Program Mode
Boot
Mode
User Program Mode
Total erase
Yes
Yes
Block erase
No
Yes
Programming control program
*
(2)
(1) (2) (3)
(1) Erase/erase-verify
(2) Program/program-verify
(3) Emulation
Note:
*
To be provided by the user, in accordance with the recommended algorithm.
Summary of Contents for H8S/2627
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