HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 619

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

23.2
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 23.2. 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 23.1. Figure 23.3
shows the boot mode and figure 23.4 shows the user program mode.
Table 23.1 Differences between Boot Mode and User Program Mode
Total erase
Block erase
Programming control program*
Note:* Should be provided by the user, in accordance with the recommended algorithm.
FLSHE = 1
SWE = 1
(on-chip ROM
User mode
enabled)
Mode Transitions
On-board programming mode
FLSHE = 0
SWE = 0
program
mode
User
Figure 23.2 Flash Memory State Transitions
Boot Mode
Yes
No
Program/program-verify
Reset state
Boot mode
*
1
*
2
Notes: Only make a transition between user mode
Programmer
=
0
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. 2.0, 08/02, page 579 of 788
User Program Mode
Yes
Yes
Program/program-verify
Erase/erase-verify