HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 122

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

5. Interrupt Controller
5.2
5.2.1
SYSCR is an 8-bit readable/writable register that controls software standby mode, selects the
action of the UI bit in CCR, selects the NMI edge, and enables or disables the on-chip RAM.
Only bits 3 and 2 are described here. For the other bits, see section 3.3, System Control Register
(SYSCR).
SYSCR is initialized to H'09 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Rev.4.00 Aug. 20, 2007 Page 78 of 638
REJ09B0395-0400
Bit
Initial value
Read/Write
Register Descriptions
System Control Register (SYSCR)
SSBY
Software standby
R/W
7
0
STS2
R/W
6
0
Standby timer
select 2 to 0
STS1
R/W
5
0
STS0
R/W
4
0
User bit enable
Selects whether to use the UI bit in
CCR as a user bit or interrupt mask bit
R/W
UE
3
1
NMI edge select
Selects the NMI input edge
NMIEG
R/W
2
0
Software standby
output port enable
SSOE
R/W
1
0
RAM enable
RAME
R/W
0
1