参数资料
型号: PC87393F-VJG
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 外设及接口
英文描述: 100-Pin LPC SuperI/O Devices for Portable Applications
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封装: TQFP-100
文件页数: 20/148页
文件大小: 1733K
代理商: PC87393F-VJG
7.0 X-Bus Extension (Continued)
116
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7.4.5
X-Bus PIRQx Input Registers (XIRQCA to XIRQCD)
This set of four registers defines the mapping of the four PIRQ signals. Each registers is associated with one of the four
PIRQ inputs, as follows:
Location:
Offset 04h (XIRQCA)
Location:
Offset 05h (XIRQCB)
Location:
Offset 06h (XIRQCC)
Location:
Offset 07h (XIRQCD)
Type:
R/W
Table 32. IRQ Polarity Control
Bit
76543210
Name
Reserved
PIRQ
Polarity
Inversion
PIRQ
Enable
PIRQ
Polarity
PWUREQ
Enable
Reset
00000000
Bit
Description
7-4
Reserved
3
PIRQ Polarity Inversion. This bit controls the polarity of the IRQ signal sent through the IRQ Serializer (see
Table 32). This bit is reset to ’0’.
2
PIRQ Enable. When this bit is set, it enables the interrupt. Ignored when the IRQ is mapped to zero (see
0:
Disabled (default).
1:
Enabled.
1
PIRQ Polarity. This bit species the active level of the incoming IRQ signal.
0:
Active low (default).
1: Active high.
0
Power-Up Request Enable. An IRQ event is routed to the PWUREQ output.
0: Disabled (default).
1: Enabled.
PIRQ Polarity
Inversion
PIRQ Polarity
Serial IRQ Polarity
0
PIRQx
01
PIRQx
1
0
PIRQx
11
PIRQx
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