h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 158

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 5 Interrupt Controller
5.2
5.2.1
Bit
Initial value
Read/Write
SYSCR is an 8-bit readable/writable register of which bits 5, 4, and 2 select the interrupt control
mode and the detected edge for NMI.
Only bits 5, 4, and 2 are described here; for details on the other bits, see section 3.2.2, 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.
Bits 5 and 4—Interrupt Control Mode 1 and 0 (INTM1, INTM0): These bits select one of four
interrupt control modes for the interrupt controller. The INTM1 bit must not be set to 1.
Bit 5
INTM1
0
1
Bit 2—NMI Edge Select (NMIEG): Selects the input edge for the NMI pin.
Bit 2
NMIEG
0
1
Rev. 4.00 Jun 06, 2006 page 104 of 1004
REJ09B0301-0400
Register Descriptions
System Control Register (SYSCR)
Bit 4
INTM0
0
1
0
1
Description
Interrupt request generated at falling edge of NMI input
Interrupt request generated at rising edge of NMI input
CS2E
R/W
7
0
Interrupt
Control Mode
0
1
2
3
IOSE
R/W
6
0
INTM1
R
5
0
Description
Interrupts are controlled by I bit
Interrupts are controlled by I and UI bits and ICR
Cannot be used in the H8S/2138 Group or H8S/2134 Group
Cannot be used in the H8S/2138 Group or H8S/2134 Group
INTM0
R/W
4
0
XRST
R
3
1
NMIEG
R/W
2
0
R/W
HIE
1
0
(Initial value)
(Initial value)
RAME
R/W
0
1