h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 770

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 24 ROM
24.2
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
Mode Transition Diagrams
Legend:
FLMCR1
FLMCR2
EBR1
EBR2
Figure 24.1 Block Diagram of Flash Memory
FLMCR1
FLMCR2
EBR1
EBR2
: Flash memory control register 1
: Flash memory control register 2
: Erase block register 1
: Erase block register 2
Internal data bus (16 bits)
Internal address bus
Bus interface/controller
Flash memory
(256 kbytes)
Operating
mode
Mode pin