HD6432646 Hitachi, HD6432646 Datasheet - Page 726

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Figure 20-13 shows the flash memory state transition diagram.
692
Legend
RD: Memory read possible
VF: Verify-read possible
PR: Programming possible
ER: Erasing possible
RD VF PR ER FLER = 0
Program mode
occurrence
Erase mode
RD VF PR ER FLER = 1
Error protection mode
Error
Figure 20-13 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
FLMCR1, FLMCR2, (except bit FLER)
EBR1, EBR2 initialization state
Error protection mode
(software standby)
RD VF PR ER FLER = 0
(hardware protection)
Reset or standby
FLMCR1, FLMCR2,
EBR1, EBR2
initialization state