Datasheet

Section 20 Flash Memory (F-ZTAT Version)
Rev. 6.00 Mar. 18, 2010 Page 716 of 982
REJ09B0054-0600
• Programmer mode
Flash memory can be programmed/erased in programmer mode using a PROM programmer,
as well as in on-board programming mode.
• Emulation function for flash memory in RAM
The real-time emulation for programming of flash memory is possible by overlapping the flash
memory to a part of RAM.
Module bus
Bus interface/controller
H8S/2239
H8S/2258
H8S/2238B
H8S/2238R
H8S/2227
Operating
mode
FLMCR2
Internal address bus
Internal data bus (16 bits)
FWE pin
Mode pin
EBR1
EBR2
RAMER
FLMCR1
Flash memory control register 1
Flash memory control register 2
Erase block register 1
Erase block register 2
RAM emulation register
Legend:
FLMCR1:
FLMCR2:
EBR1:
EBR2:
RAMER:
FLPWCR: Flash memory power control register
FLPWCR
Flash memory
: 384 kbytes
: 256 kbytes
: 256 kbytes
: 256 kbytes
: 128 kbytes
Figure 20.1 Block Diagram of Flash Memory
20.2 Mode Transitions
When the mode pins and the FWE pin are set in the reset state and a reset-start is executed, this
LSI enters an operating mode as shown in figure 20.2. 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.