HD6432621 Hitachi, HD6432621 Datasheet - Page 694

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Figure 19-13 shows the flash memory state transition diagram.
650
Legend
RD: Memory read possible
VF: Verify-read possible
PR: Programming possible
ER: Erasing possible
RD VF PR ER FLER = 0
Program mode
occurrence
RD VF PR ER FLER = 1
Erase mode
Error protection mode
Error
Figure 19-13 Flash Memory State Transitions
Error occurrence
(software standby)
RD: Memory read not possible
VF: Verify-read not possible
PR: Programming not possible
ER: Erasing not possible
RES = 0 or HSTBY = 0
Software
standby mode
Software standby
mode release
RES = 0 or
HSTBY = 0
HSTBY = 0
RES = 0 or
RD VF PR ER FLER = 1
Error protection mode
FLMCR1, FLMCR2, EBR1, EBR2
initialization state
(software standby)
RD VF PR ER FLER = 0
(hardware protection)
Reset or standby
FLMCR1, FLMCR2,
EBR1, EBR2
initialization state