HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 703

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

19.2
When the mode pin and the FWP pin are set in the reset state and a reset-start is executed, this LSI
enters an operating mode as shown in figure 19.2. In user mode, flash memory can be read but not
programmed or erased.
The boot mode, user program mode, and PROM 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 19.1.
Figure 19.3 shows boot mode, and figure 19.4 shows user program mode.
Mode Transitions
Notes: Only make a transition between user mode and user program mode when the CPU is not accessing
the flash memory.
1. RAM emulation possible
2. This LSI transits to PROM programmer mode by using the dedicated PROM programmer.
FWP = 0
(on-chip ROM
Figure 19.2 Flash Memory State Transitions
User mode
enabled)
On-board programming mode
program mode
FWP = 1
* 1
User
MD1 = 1,
FWP = 1
RES = 0
* 1
MD1 = 0,
FWP = 0
Rev.4.00 Mar. 27, 2008 Page 659 of 882
Boot mode
19. Flash Memory (F-ZTAT Version)
RES = 0
* 2
RES = 0
programmer
REJ09B0108-0400
PROM
mode