Datasheet
Appendix 
Page 1364 of 1408    R01UH0309EJ0500 Rev. 5.00 
 Sep 24, 2012 
H8S/2456, H8S/2456R, H8S/2454 Group
Port Name 
Pin Name 
MCU 
Operating 
Mode 
Reset 
Hardware 
Standby 
Mode 
Software Standby 
Mode 
Bus Release 
State 
Program 
Execution State 
Sleep Mode 
1, 2, 4  H 
PF3/LWR 
3, 7  T 
T [LWR output, 
OPE = 0] 
T 
[LWR output, 
OPE = 1] 
H 
[Other than the 
above] 
Keep 
[LWR output] 
T 
[Other than the 
above] 
Keep 
[LWR output] 
LWR 
[Other than the 
above] 
I/O port 
PF2/LCAS/ 
DQML*
1
1, 2, 3, 4, 7  T  T  [LCAS, DQML 
output, OPE = 0] 
T 
[LCAS, DQML 
output, OPE = 1] 
H 
[Other than the 
above] 
Keep 
[LCAS, DQML 
output] 
T 
[Other than the 
above] 
Keep 
[LCAS, DQML 
output] 
LCAS, DQML 
[Other than the 
above] 
I/O port 
PF1/UCAS/ 
DQMU*
1
1, 2, 3, 4, 7  T  T  [UCAS, DQMU 
output, OPE = 0] 
T 
[UCAS, DQMU 
output, OPE = 1] 
H 
[Other than the 
above] 
Keep 
[UCAS, DQMU 
output] 
T 
[Other than the 
above] 
Keep 
[UCAS, DQMU 
output] 
UCAS 
[Other than the 
above] 
I/O port 
PF0/WAIT-A  1, 2, 3, 4, 7  T  T  [WAIT-A input] 
T 
[Other than the 
above] 
Keep 
[WAIT-A input] 
T 
[Other than the 
above] 
Keep 
[WAIT-A input] 
WAIT-A 
[Other than the 
above] 
I/O port 
PG6/ 
BREQ-A 
1, 2, 3, 4, 7  T  T  [BREQ-A input] 
T 
[Other than the 
above] 
Keep 
[BREQ-A input] 
BREQ-A 
[Other than the 
above] 
Keep 
[BREQ-A input] 
BREQ-A 
[Other than the 
above] 
I/O port 










