HD64F3048F16 Datasheet, PDF (604/903 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 18 ROM (H8/3048F-ONE: Single Power Supply, H8/3048B Mask ROM Version)
18.2.1 Block Diagram
Internal address bus
Internal data bus (16 bits)
FLMCR1
FLMCR2
EBR
RAMCR
Bus interface/controller
Operating
mode
FWE pin
Mode pin
Flash memory
(128 kbytes)
Legend:
FLMCR1: Flash memory control register 1
FLMCR2: Flash memory control register 2
EBR:
Erase block register
RAMCR: RAM control register
Note: Never apply 12 V to the H8/3048F-ONE (single power supply).
Otherwise, the LSI will be permanently damaged.
Figure 18.1 Block Diagram of Flash Memory
18.2.2 Mode Transitions
When the mode pins and the FWE pin are set in the reset state and a reset-start is executed, the
microcomputer enters an operating mode as shown in figure 18.2. In user mode, flash memory can
be read but not programmed or erased.
The boot, user program and PROM modes are provided as modes to write and erase the flash
memory.
Rev. 3.00 Sep 27, 2006 page 576 of 872
REJ09B0325-0300