Rev.6.00 Oct.28.2004 page 621
of 1016
REJ09B0138-0600H
19.15.3
Flash Memory Operating Modes
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 19-37. 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.
Boot mode
On-board programming mode
User
program mode
User mode
(on-chip ROM
enabled)
Reset state
Programmer mode
RES
= 0
SWE = 1
SWE = 0
*
Notes: Only make a transition between user mode and user program mode when the CPU is
not accessing the flash memory.
*
MD0 = 0, MD1 = 0, MD2 = 0, P66 = 1, P65 = 0, P64 = 0
RES
= 0
RES
= 0
RES
= 0
MD1 = 1,
MD2 = 1
MD1 = 1,
MD2 = 0
Figure 19-37 Flash Memory Mode Transitions
Summary of Contents for ZTAT H8S/2357F
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