h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 467

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

18.2
When the mode pins are set in the reset state and a reset-start is executed, this LSI enters an
operating mode as shown in figure 18.2. In user mode, flash memory can be read but not
programmed or erased. The boot, user program, and programmer modes are provided as modes to
write and erase the flash memory.
The differences between boot mode and user program mode are shown in table 18.1. Figure 18.3
shows the boot mode and figure 18.4 shows the user program mode.
Table 18.1 Differences between Boot Mode and User Program Mode
Note:
Total erase
Block erase
Programming control program*
FLSHE = 1
SWE = 1
(on-chip ROM
User mode
*
enabled)
Mode Transitions
Should be provided by the user, in accordance with the recommended algorithm.
On-board programming mode
FLSHE = 0
SWE = 0
program
mode
User
Figure 18.2 Flash Memory State Transitions
Boot Mode
Yes
No
Program/program-verify
Reset state
Boot mode
*
1
*
2
RES = 0
Notes: Only make a transition between user mode
Programmer
mode
and user program mode when the CPU is not
accessing the flash memory.
1. MD1 = MD0 = 0, P92 = P91 = P90 = 1
2. MD1 = MD0 = 0, P92 = 0, P91 = P90 = 1
Rev. 1.00, 05/04, page 433 of 544
User Program Mode
Yes
Yes
Program/program-verify
Erase/erase-verify