Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 908 of 1268
REJ09B0220-0600
Do not touch the socket adapter or chip during programming: Touching either of these can
cause contact faults and write errors.
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)
φ
V
CC
FWE
t
OSC1
Min 0 μs
Min 0 μs
t
MDS
*3
t
MDS
*3
MD2 to MD0
*1
RES
SWE bit
SWE set
SWE cleared
Programming/
erasing
possible
Wait time: x Wait time: 100 μs
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 section 22.2.6, Flash Memory Characteristics.
3. Mode programming setup time t
MDS
(min) = 200 ns
Figure 19.86 Power-On/Off Timing (Boot Mode)