HD6432621 Hitachi, HD6432621 Datasheet - Page 714

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

670
VCC
FWE
MD2 to MD0
RES
SWE1 bit
Notes: *1 Except when switching modes, the level of the mode pins (MD2–MD0) must be fixed until power-
Period during which flash memory access is prohibited
(x: Wait time after setting SWE1 bit)
Period during which flash memory can be programmed
(Execution of program in flash memory prohibited, and data reads other than verify operations
prohibited)
*2 See section 22.6, Flash Memory Characteristics.
*3 Mode programming setup time t
off by pulling the pins up or down.
*1
Figure 19-26 Power-On/Off Timing (Boot Mode)
t
OSC1
SWE1 set
t
MDS
*2
t
MDS
*3
MDS
Wait time:
*3
(min) = 200 ns
x
Program-
ming/
erasing
possible
Wait time:
100 s
Min 0 s
SWE1 cleared
Min 0 s