Figure 19.12 Mode Transition Timing (Example: Boot Mode → User Mode ↔ User Program Mode) - Renesas H8S/2368 Series Hardware Manual

φ
t
OSC1
V
CC
MD2 to MD0
SWE bit
Mode
change
Period during which flash memory access is prohibited
(x: Wait time after setting SWE bit)*
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 When entering boot mode or making a transition from boot mode to another mode, mode switching must be
carried out by means of
pins ( , ,
input is low), and therefore these pins should not be used as output signals during this time.
*2 When making a transition from boot mode to another mode, a mode programming setup time t
ns is necessary with respect to
*3 See section 24.3, Flash Memory Characteristics.
*4 Wait time: 100 µs
(Example: Boot Mode → → → → User Mode ↔
Rev. 2.00, 05/03, page 672 of 820
Wait time: x
Programming/erasing
possible
4
*
t
t
MDS
t
RESW
SWE SWE
set cleared
Boot Mode
1
*
mode change
3
input. The state of ports with multiplexed address functions and bus control output
, ) will change during this switchover interval (the interval during which the
clearance timing.
Figure 19.12 Mode Transition Timing
Wait time: x
Programming/erasing
possible
4
*
2
*
MDS
User User User
1 mode program mode
*
mode
↔ User Program Mode)
↔ ↔
Wait time: x
Wait time: x
Programming/erasing Programming/erasing
possible possible
4
*
User User mode User
program program
mode mode
(min) of 200
MDS
4
*
pin