參數(shù)資料
型號: 21890
英文描述: ?lanSC300 Evaluation Board User's Manual
中文描述: ?lanSC300評估板用戶手冊
文件頁數(shù): 86/162頁
文件大?。?/td> 1974K
代理商: 21890
élanSC300 Microcontroller Evaluation Board User’s Manual
4-14
1
Evaluation Board’s IRQ Mapping
Because the élanSC300 microcontroller and the evaluation board are so
configurable, there is not one single IRQ map that covers all cases. What is
illustrated here is a typical memory map for the evaluation board configured in
Full ISA mode with the élanSC300 microcontroller internal serial port enabled as
COM1, the Super I/O floppy drive controller enabled, an IDE hard drive, and the
Super I/O serial port enabled as COM2.
Table 4-4. Typical Full ISA IRQ Mapping
NOTE:
1. IRQ lines 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 and 15 are available on the ISA bus and
PCMCIA bus. Care must be taken so that cards on the ISA bus/PCMCIA bus
do not use interrupts that conflict with internal élanSC300 devices or each
other.
IRQ Device Assigned
15
Available for ISA bus or PCMCIA slots
14
Connected to IDE interface
13
Reserved
12
Available for ISA bus or PCMCIA slots
11
Available for ISA bus or PCMCIA slots
10
Available for ISA bus or PCMCIA slots
9
Available for ISA bus or PCMCIA slots
8
élanSC300 internal RTC interrupt
7
élanSC300 internal parallel port
6
Super I/O floppy drive controller
5
Available for ISA bus or PCMCIA slots
4
Internal serial port; COM1
3
Connected to Super I/O for COM2
Special Notes
Connects to IRQ3 pin on Super
I/O
2
1
0
Used to cascade to Slave PIC (8259)
Keyboard buffer full (driven by 8042)
Timer 0 output (internal to élanSC300)
Typically used for DOS Clock
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