SH7144 Datasheet, PDF (613/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

*¹
User mode
(on-chip ROM
enabled)
MD1 = 1,
FWP = 1
=0
MD1 = 1,
FWP = 0
FWP = 0 ^{FWP = 1}
Reset state
=0
MD1 = 0,
FWP = 0
*²
=0
User
*¹
program mode
=0
PROM
programmer
mode
On-board programming mode
Boot mode
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 PROM programmer mode by using the dedicated PROM programmer.
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*
Program/program-verify Erase/erase-verify
Program/program-verify
Emulation
Note: * To be provided by the user, in accordance with the recommended algorithm.
Rev. 2.0, 09/02, page 573 of 732