HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 823

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

19.13.3 Flash Memory Operating Modes
Mode Transitions: When the mode pins and the FWE pin are set in the reset state and a reset-
start is executed, the chip enters one of the operating modes shown in figure 19.30. 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.
Notes: Only make a transition between user mode and user program mode when the CPU is
FWE = 1,
SWE = 1
(on-chip ROM
User mode
enabled)
not accessing the flash memory.
* MD0 = 0, MD1 = 0, MD2 = 0, P66 = 1, P65 = 0, P64 = 0
On-board programming mode
program mode
FWE = 0
or SWE = 0
User
Figure 19.30 Flash Memory Mode Transitions
MD1 = 1,
MD2 = 1,
FWE = 0
RES = 0
RES = 0
FWE = 1,
MD1 = 1,
MD2 = 0
Reset state
Boot mode
Rev.6.00 Sep. 27, 2007 Page 793 of 1268
RES = 0
*
RES = 0
REJ09B0220-0600
PROM mode
Section 19 ROM