HD6433308 Datasheet, PDF (330/349 Pages) Hitachi Semiconductor – Hitachi Single-Chip MicroComputer

P9DR—Port 9 Data Register
H’FFC1
Port 9
Bit
7
6
5
4
3
2
1
0
P97 P96
P95
P94
P93
P92
P91
P90
Initial value 0
0
0
0
0
0
0
0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
SYSCR—System Control Register
H’FFC4
System Control
Bit
Initial value
Read/Write
7
SSBY
0
R/W
6
STS2
0
R/W
5
STS1
0
R/W
4
STS0
0
R/W
3
2
1
0
— NMIEG DPME RAME
1
0
0
1
— R/W R/W R/W
RAM Enable
0 On-chip RAM is disabled.
1 On-chip RAM is enabled.
Dual-Port RAM Enable
0 Dual-port RAM is disabled.
1 (1) Single-chip mode: dual-port RAM is enabled.
(2) Expanded modes: no effect
NMI Edge
0 Falling edge of NMI is detected.
1 Rising edge of NMI is detected.
Standby Timer Select
0 0 0 Clock settling time = 8192 states
0 0 1 Clock settling time = 16384 states
0 1 0 Clock settling time = 32768 states
0 1 1 Clock settling time = 65536 states
1 – – Clock settling time = 131072 states
Software Standby
0 SLEEP instruction causes transition to sleep mode.
1 SLEEP instruction causes transition to software standby mode.
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