Block Diagram - Hitachi F-ZTAT H8/3039 Series Hardware Manual

• Protect modes
There are three protect modes, hardware, software, and error protect, which allow protected
status to be designated for flash memory program/erase/verify operations.
15.2.2

Block Diagram

Figure 15-1 shows a block diagram of the flash memory.
FLMCR*
RAMCR*
FLMSR*
Legend:
FLMCR: Flash memory control register
EBR: Erase block register
RAMCR: RAM control register
FLMSR: Flash memory status register
Notes: 1. Functions as the FWE pin in the flash memory versions and as the RESO pin in the
mask ROM versions.
2. The registers that control the flash memory versions (FLMCR, EBR, RAMCR, and
FLMSR) are used in the flash memory versions only. They are not provided in the
mask ROM versions. Reading the corresponding addresses in a mask ROM version
will always return 1s, and writes to these addresses are disabled.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
2
2
EBR*
Bus interface/controller
2
2
H'00000
H'00002
On-chip Flash memory
H'1FFFC
H'1FFFE
even address odd address
Figure 15-1 Block Diagram of Flash Memory
H'00001
H'00003
(128 kbytes)
H'1FFFD
H'1FFFF
Operating
FWE pin*
mode
Mode pins
1
439