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HD64F2149YV bảng dữ liệu(PDF) 133 Page - Renesas Technology Corp

tên linh kiện HD64F2149YV
Giải thích chi tiết về linh kiện  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
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HD64F2149YV bảng dữ liệu(HTML) 133 Page - Renesas Technology Corp

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Section 5 Interrupt Controller
Rev. 3.00 Jan 18, 2006 page 105 of 1044
REJ09B0280-0300
5.2
Register Descriptions
5.2.1
System Control Register (SYSCR)
7
CS2E
0
R/W
6
IOSE
0
R/W
5
INTM1
0
R
4
INTM0
0
R/W
3
XRST
1
R
0
RAME
1
R/W
2
NMIEG
0
R/W
1
HIE
0
R/W
Bit
Initial value
Read/Write
SYSCR is an 8-bit readable/writable register that selects the interrupt control mode, and the
detected edge for NMI, among other functions.
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
Bit 4
Interrupt
INTM1
INTM0
Control Mode
Description
0
0
0
Interrupts are controlled by I bit
(Initial value)
1
1
Interrupts are controlled by I and UI bits and ICR
1
0
2
Cannot be used in the chip
1
3
Cannot be used in the chip
Bit 2—NMI Edge Select (NMIEG): Selects the input edge for the NMI pin.
Bit 2
NMIEG
Description
0
Interrupt request generated at falling edge of NMI input
(Initial value)
1
Interrupt request generated at rising edge of NMI input



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