HD6432621 Hitachi, HD6432621 Datasheet - Page 715
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
(1069 pages)
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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 19-27 Power-On/Off Timing (User Program Mode)
t
OSC1
t
MDS
SWE1 set
*3
*2
MDS
Wait time:
(min) = 200 ns
x
Program-
ming/
erasing
possible
Wait time:
100 s
SWE1 cleared
Min 0 s
671
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