837
SWE1 set
SWE1 cleared
ø
V
CC
FWE
t
OSC1
Min 0
µ
s
MD2 to MD0
*
1
RES
SWE1 bit
Programming/
erasing
possible
Wait time: x
Wait time: 100
µ
s
t
MDS
*
3
Period during which flash memory access is prohibited
(x: Wait time after setting SWE1 bit)
*
2
Period during which flash memory can be programmed
(Execution of program in flash memory prohibited, and data reads other than verify operations
prohibited)
Notes: 1. Except when switching modes, the level of the mode pins (MD2 to MD0) must be fixed until
power-off by pulling the pins up or down.
2. See 25.6 Flash Memory Characteristics.
3. Mode programming setup time t
MDS
(min) = 200 ns
Figure 22-27 Power-On/Off Timing (User Program Mode)