HD6432670 Hitachi, HD6432670 Datasheet - Page 817

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

Notes: 1. Except when switching modes, the level of the mode pins (MD2 to MD0) must be fixed until
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)
V
MD2 to MD0
SWE bit
V
MD2 to MD0
SWE bit
CC
CC
2. See section 24.6, Flash Memory Characteristics.
3. Mode programming setup time t
power-off by pulling the pins up or down.
Figure 19.13 Power-On/Off Timing (H8S/2678R Series)
*1
*1
t
OSC1
t
OSC1
t
MDS
Wait time: x
*2
SWE set
Wait time: x
t
SWE set
MDS
*3
MDS
*3
(1) Boot Mode
(2) User Program Mode
(min) = 200 ns
Programming/
erasing
possible
Programming/
erasing
possible
Wait time: 100 s
Wait time: 100 s
Rev. 2.0, 04/02, page 771 of 906
SWE cleared
SWE cleared
Min 0 s
Min 0 s