Datasheet

Section 17 ROM
Rev.7.00 Feb. 14, 2007 page 627 of 1108
REJ09B0089-0700
SWE set
SWE cleared
φ
V
CC
FWE
t
OSC1
Min 0 μs
MD2 to MD0
*1
RES
SWE bit
Programming/
erasing
possible
Wait time: xWait time: 100 μs
t
MDS
*3
Period during which flash memory access is prohibited
(x: Wait time after setting SWE 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 t
he pins up or down.
2. See section 20.3.6, Flash Memory Characteristics.
3. Mode programming setup time t
MDS
(min) = 200 ns
Figure 17.31 Power-On/Off Timing (User Program Mode)