HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 636

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

Notes
ø
V
V
MD2
to 0
RES
V
CC
PP
PP
E bit
Period during which flash memory access is prohibited
Period during which flash memory can be rewritten
(Execution of program in flash memory prohibited, and data reads other than verify operations prohibited)
1
2
2.7 to
5.5 V
0 to
Vcc V
0 to
Vcc V
out by means of RES input. The pin output states change during this switchover interval (the interval during which
the RES pin is low), and therefore these pins should not be used as output signals during this time.
When making a transition from boot mode to another mode, the flash memory read setup time t
mode programming setup time t
When entering boot mode or making a transition from boot mode to another mode, mode switching must be carried
12 0.6 V
min 0 s
(Example: Boot Mode
12 0.6 V
tosc1
t
Mode
switch-
ing*
MDS
min 0 s
V
set
ppE
1
Figure 18-30 Mode Transition Timing
t
VPS
Boot mode
MDS
Programming/
erasing
possible
VppE
cleared
must be satisfied with respect to RES clearance timing.
t
FRS
t
Mode
switch-
ing*
FRS
min 10 ø
*
User Mode
2
1
t
MDS
627
User
mode
*
2
Clear
VppE
t
VPS
Programming/
erasing
possible
User program mode
User Program Mode)
t
FRS
t
VPS
Programming/
erasing
possible
t
FRS
FRS
User
mode
and
t
VPS
User program
mode
Programming/
erasing
possible