
Rev. 1.0, 09/02, page 446 of 568
Module bus
Bus interface/controller
Flash memory
(128 kbytes)
Operating
mode
FLMCR2
Internal address bus
Internal data bus (16 bits)
FWE pin
Mode pins
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:
Figure 19.1 Block Diagram of Flash Memory
19.2 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 19.2. 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 19.1.
Figure 19.3 shows the operation flow for boot mode and figure 19.4 shows that for user program
mode.
Содержание H8S/2627
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