h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 87

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

3.2.2
SYSCR selects a system pin function, monitors a reset source, selects the interrupt control mode
and the detection edge for NMI, pin location selection, enables or disables register access to the
on-chip peripheral modules, and enables or disables on-chip RAM address space.
Bit
7 and 6
5
4
3
2
System Control Register (SYSCR)
Bit Name
—
INTM1
INTM0
XRST
NMIEG
Initial
Value
All 0
0
0
1
0
R/W
R/W
R
R/W
R
R/W
Description
Reserved
The initial value should not be changed.
These bits select the control mode of the interrupt
controller. For details on the interrupt control modes
and interrupt control select modes 1 and 0, see
section 5.6, Interrupt Control Modes and Interrupt
Operation.
00: Interrupt control mode 0
01: Interrupt control mode 1
10: Setting prohibited
11: Setting prohibited
External Reset
This bit indicates the reset source. A reset is caused
by an external reset input, or when the watchdog
timer overflows.
0: A reset is caused when the watchdog timer
1: A reset is caused by an external reset.
NMI Edge Select
Selects the valid edge of the NMI interrupt input.
0: An interrupt is requested at the falling edge of NMI
1: An interrupt is requested at the rising edge of NMI
overflows.
input
input
Rev. 1.00, 05/04, page 53 of 544