HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 772

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 19 ROM
19.4.3
Mode Transitions: When the mode pins are set in the reset state and a reset-start is executed, the
chip enters one of the operating modes shown in figure 19.3. In user mode, flash memory can be
read but not programmed or erased.
Flash memory can be programmed and erased in boot mode, user program mode, and PROM
mode.
Rev.6.00 Sep. 27, 2007 Page 742 of 1268
REJ09B0220-0600
Notes: Only make a transition between user mode and user program mode when the CPU is
SWE = 1
(on-chip ROM
User mode
enabled)
Flash Memory Operating Modes
not accessing the flash memory.
* MD0 = 0, MD1 = 0, MD2 = 0, P66 = 1, P65 = 0, P64 = 0
On-board programming mode
program mode
SWE = 0
User
Figure 19.3 Flash Memory Mode Transitions
MD1 = 1,
MD2 = 1
RES = 0
RES = 0
MD1 = 1,
MD2 = 0
Reset state
Boot mode
RES = 0
*
RES = 0
PROM mode