h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 987

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

φ
V
FWE
MD2 to MD0
RES
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)
2. When making a transition from boot mode to another mode, a mode programming setup time t
3. See section 24.2.7, 24.3.7, and 24.4.7, Flash Memory Characteristics.
carried out by means of RES input. The state of ports with multiplexed address functions and bus control
output pins (AS, RD, WR) will change during this switchover interval (the interval during which the RES pin
input is low), and therefore these pins should not be used as output signals during this time.
ns is necessary with respect to RES clearance timing.
(Example: Boot Mode
t
OSC1
Mode
change
SWE
set
t
MDS
t
MDS
*1
Figure 21C-28 Mode Transition Timing
Boot
mode
*3
Mode
change
t
SWE
cleared
RESW
Min. 0 µs
t
MDS
User Mode
*1
*2
User
mode
User program mode
Rev. 6.00 Feb 22, 2005 page 927 of 1484
User Program Mode)
Section 21C ROM (H8S/2635 Group)
User
mode
REJ09B0103-0600
User program
mode
MDS
(min.) of 200