HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 564
HD6433044
Manufacturer Part Number
HD6433044
Description
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6433044.pdf
(867 pages)
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17.2 System Control Register (SYSCR)
One function of SYSCR is to enable or disable access to the on-chip RAM. The on-chip RAM is
enabled or disabled by the RAME bit in SYSCR. For details about the other bits, see section 3.3,
System Control Register (SYSCR).
Bit 0—RAM Enable (RAME): Enables or disables the on-chip RAM. The RAME bit is
initialized at the rising edge of the input at the
mode.
Bit 0
RAME
0
1
Bit
Initial value
Read/Write
Description
On-chip RAM is disabled
On-chip RAM is enabled
Software standby
SSBY
R/W
7
0
STS2
R/W
6
0
Standby timer select 2 to 0
STS1
R/W
5
0
RES pin. It is not initialized in software standby
STS0
555
R/W
4
0
User bit enable
R/W
UE
3
1
NMIEG
R/W
NMI edge select
2
0
Reserved bit
—
—
1
1
RAM enable
Enables or
disables
on-chip RAM
(Initial value)
RAME
R/W
0
1
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