參數(shù)資料
型號: XR17D152CM-0A-EVB
廠商: Exar Corporation
文件頁數(shù): 13/68頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR17D152 100TQFP
標準包裝: 1
系列: *
XR17D152
á
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
REV. 1.2.0
20
MPIOINT [7:0] (default 0x00)
Enable multipurpose input pin interrupt. If the pin is selected by MPIOSEL as input then bit-0 enables input pin
0 for interrupt, and bit-7 enables input pin 7. No interrupt is enable if the pin is selected to be an output. The
interrupt is edge sensing and determined by MPIOINV and MPIOLVL registers. The MPIO interrupt clears after
a read to register MPIOLVL. The combination of MPIOLVL and MPIOINV determines the interrupt being active
low or active high, it’s level trigger. Logic 0 (default) disables the pin’s interrupt and logic 1 enables it.
FIGURE 8. MULTIPURPOSE INPUT/OUTPUT INTERNAL CIRCUIT
MPIO
Pin [7:0]
MPIOLVL [7:0]
Read Input Level
MPIOINT [7:0]
Rising Edge
Detection
INT
OR
AND
1
0
MPIOSEL [7:0]
(Select Input=1, Output=0 )
MPIO3T [7:0]
(3-state Enable =1)
MPIOLVL [7:0]
(Output Level)
MPIOINV [7:0]
(Input Inversion Enable =1)
MPIOCKT
MPIO 6
MPIO 7
MPIO 5 MPIO 4 MPIO 3 MPIO 2 MPIO 1 MPIO 0
M P IO IN T R eg ister
M ultipu rpo se Inp ut/O u tpu t In terrup t E n ab le
B it-7 B it-6
B it-5
B it-4
B it-3
B it-2
B it-1 B it-0
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