r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 910

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 22 Flash Memory
22.2.2
When each mode pin and the FWE pin are set in the reset state and the reset signal is released, the
microcomputer enters each operating mode as shown in figure 22.2. For the setting of each mode
pin and the FWE pin, see table 22.1.
• Flash memory cannot be read, programmed, or erased in ROM invalid mode. The
• Flash memory can be read in user mode, but cannot be programmed or erased.
• Flash memory can be read, programmed, or erased on the board only in user program mode,
• Flash memory can be read, programmed, or erased by means of the PROM programmer in
Rev. 1.00 Sep. 21, 2007 Page 884 of 1124
REJ09B0402-0100
programming/erasing interface registers cannot be written to. When these registers are read,
H'00 is always read.
user boot mode, and boot mode.
programmer mode.
Operating Mode
User mode
ROM invalid
mode
RAM emulation is enabled
Figure 22.2 Mode Transition of Flash Memory
FWE = 0
FWE = 1
ROM invalid
mode setting
RES = 0
User program
mode
Reset state
On-board programming mode
User boot
mode
Programmer
mode setting
RES = 0
Programmer
Boot mode
mode