Register Configuration; System Control Register (Syscr) - Hitachi H8/3032 Series Hardware Manual

16.2 Register Configuration

The H8/3032 Series' system control register (SYSCR) controls the power-down state. Table 16-2
summarizes this register.
Table 16-2 Control Register
Address*
H'FFF2
Note: * Lower 16 bits of the address.

16.2.1 System Control Register (SYSCR)

Bit
Initial value
Read/Write
SYSCR is an 8-bit readable/writable register. Bit 7 (SSBY) and bits 6 to 4 (STS2 to STS0) control
the power-down state. For information on the other SYSCR bits, see section 3.3, System Control
Register.
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Name Abbreviation
System control register SYSCR
7 6 5
SSBY STS2 STS1
0 0 0
R/W R/W R/W
Standby timer select 2 to 0
These bits select the
waiting time at exit from
software standby mode
Software standby
Enables transition to
software standby mode
R/W Initial Value
R/W H'0B
4 3 2
STS0 UE NMIEG
0 1 0
R/W
R/W R/W
NMI edge select
User bit enable
412
1 0
— RAME
1 1
— R/W
RAM enable
Reserved bit