HD6432670 Hitachi, HD6432670 Datasheet - Page 818

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Rev. 2.0, 04/02, page 772 of 906
V
MD2 to MD0
SWE bit
CC
V
FWE
MD2 to MD0
SWE bit
Notes: 1. When entering boot mode or making a transition from boot mode to another mode, mode switching must be
CC
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)
(Example: Boot Mode
2. When making a transition from boot mode to another mode, a mode programming setup time t
3. See section 24.6, Flash Memory Characteristics.
4. Wait time: 100 s
carried out by means of RES input. The state of ports with multiplexed address functions and bus control output
pins (
input is low), and therefore these pins should not be used as output signals during this time.
ns is necessary with respect to
t
OSC1
t
,
OSC1
Mode
change
,
t
SWE
set
MDS
Mode
change
SWE
set
t
MDS
Figure 19.14 Mode Transition Timing
t
MDS
* 1
,
Wait time: x
Programming/erasing
possible
*1
Wait time: x
Programming/erasing
possible
) will change during this switchover interval (the interval during which the
Boot
mode
Boot
mode
*3
* 4
clearance timing.
SWE
cleared
Mode
change
Mode
change
t
t
(1) H8S/2678 Series
(2) H8S/2678R Series
RESW
SWE
cleared
RESW
Min 0 s
t
t
MDS
MDS
User Mode
* 1
*1
* 2
*2
Wait time: x
Programming/erasing
possible
Wait time: x
Programming/erasing
possible
User
mode
User
mode
User program mode
User
program
mode
* 4
User
mode
User Program Mode)
Wait time: x
Programming/erasing
possible
Wait time: x
Programming/erasing
possible
User
program
mode
* 4
User mode
User
mode
User program
mode
Wait time: x
Programming/erasing
possible
MDS
Wait time: x
Programming/erasing
possible
User
program
mode
(min) of 200
pin