參數(shù)資料
型號: XR17D158
廠商: Exar Corporation
英文描述: UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
中文描述: 通用(3.3V和5V)PCI總線八進制的UART
文件頁數(shù): 23/72頁
文件大?。?/td> 1520K
代理商: XR17D158
xr
REV. 1.2.1
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
XR17D158
23
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.
MPIOLVL [7:0] (default 0x00)
Output pin level control and input level status. The status of the input pin(s) is read on this register and output
pins are controlled on this register. A logic 0 (default) sets the output to low and a logic 1 sets the output pin to
high. The MPIO interrupt will clear upon reading this register.
F
IGURE
8. M
ULTIPURPOSE
INPUT
/
OUTPUT
INTERNAL
CIRCUIT
MPIO
Pin [7:0]
MPIOLVL [7:0]
Read Input Level
MPIOINT [7:0]
Rising Edge
Detection
INT
OR
AND
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
MPIO6
MPIO7
MPIO5 MPIO4 MPIO3 MPIO2 MPIO1 MPIO0
MPIOINT Register
Multipurpose Input/Output Interrupt Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
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