HD6432670 Hitachi, HD6432670 Datasheet - Page 788

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

19.2
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 boot mode. Figure 19.4 shows user program mode.
Rev. 2.0, 04/02, page 742 of 906
Legend
FLMCR1: Flash memory control register 1
FLMCR2: Flash memory control register 2
EBR1:
EBR2:
RAMER:
SYSCR:
Note: * Only in H8S/2678 series.
Mode Transitions
Erase block register 1
Erase block register 2
RAM emulation register
System control register
FLMCR1
FLMCR2
RAMER
SYSCR
EBR1
EBR2
Figure 19.1 Block Diagram of Flash Memory
Internal data bus (16 bits)
Internal address bus
Bus interface/controller
Flash memory
Operating
mode
FWE pin*
Mode pins