HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 397
HD6412332
Manufacturer Part Number
HD6412332
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412332.pdf
(1244 pages)
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System Control Register (SYSCR)
SYSCR is an 8-bit readable/writable register that selects the interrupt control mode, controls the
LWR pin, switches the IRQ
initialized to H'01 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 either of
two interrupt control modes for the interrupt controller. For details, see section 5, Interrupt
Controller.
Bit 3—NMI Edge Select (NMIEG): Selects the input edge for the NMI pin. For details, see
section 5, Interrupt Controller.
Bit 2—LWR Output Disable (LWROD): Enables or disables LWR output. For details, see
section 9.16, Port F.
Bit 1—IRQ Port Switching Select (IRQPAS): Selects switching of input pins for IRQ
IRQ
Bit 1
IRQPAS
0
1
Bit 0—RAM Enable (RAME): Enables or disables on-chip RAM. For details, see section 18,
RAM.
Bit
Initial value :
R/W
4
to IRQ
7
input is always performed from one of the ports.
:
:
Description
P9
P5
4
3
R/W
to P9
to P5
—
7
0
7
0
used for RQ
used for IRQ
4
to IRQ
—
—
6
0
7
input pins, and selects the detected edge for NMI. SYSCR is
4
4
INTM1
to IRQ
R/W
to IRQ
5
0
7
7
input
input
INTM0
R/W
0
4
Rev.4.00 Sep. 07, 2007 Page 367 of 1210
NMIEG
R/W
3
0
LWROD IRQPAS
R/W
2
0
REJ09B0245-0400
R/W
1
0
(Initial value)
4
to IRQ
RAME
R/W
0
1
7
.
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