Mode Transition Diagrams; Figure 24.1 Block Diagram Of Flash Memory - Renesas H8S/2158 User Manual

Section 24 ROM
Legend:
FLMCR1
FLMCR2
EBR1
EBR2
24.2

Mode Transition Diagrams

When the mode pins are set in the reset state and a reset-start is executed, this LSI enters an
operating mode as shown in figure 24.2. In user mode, flash memory can be read but not
programmed or erased. The boot, user program, and 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 24.1. Figure 24.3
shows the boot mode and figure 24.4 shows the user program mode.
Rev. 3.00 Jan 25, 2006 page 718 of 872
REJ09B0286-0300
Internal address bus
Internal data bus (16 bits)
FLMCR1
FLMCR2
Bus interface/controller
EBR1
EBR2
Flash memory
(256 kbytes)
: Flash memory control register 1
: Flash memory control register 2
: Erase block register 1
: Erase block register 2

Figure 24.1 Block Diagram of Flash Memory

Operating
Mode pin
mode