xr17c152im Exar Corporation, xr17c152im Datasheet - Page 19

• Manufacturer Part Number: xr17c152im
• Description: 5v Pci Bus Dual Uart
• Manufacturer: Exar Corporation

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REV. 1.2.0
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.
MPIO3T [7:0] (default 0x00)
Output pin three-state control. A logic 0 (default) sets the output to active level per register MPIOBIT settling, a
logic 1 sets the output pin to tri-state.
MPIOINV [7:0] (default 0x00)
Input inversion control. A logic 0 (default) does not invert the input pin logic. A logic 1 inverts the input logic
level.
MPIOSEL [7:0] (default 0xFF)
Multipurpose input/output pin select. This register defines the functions of the pins. A logic 1 (default) defines
the pin for input and a logic 0 for output.
MPIO7
B it-7 B it-6 B it-5 B it-4 B it-3 B it-2 B it-1 B it-0
M P IO 7
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
B it-7 B it-6 B it-5 B it-4 B it-3 B it-2 B it-1 B it-0
M P IO 7
B it-7 B it-6 B it-5 B it-4 B it-3 B it-2 B it-1 B it-0
M P IO 7
M ultipurpose Input S ignal Inversion E nable
MPIO6
M P IO 6
Multipurpose Input/Output Selection
M ultipurpose O utput Level C ontrol
M P IO 6
M P IO 6
M ultipurpose O utput 3-state E n able
MPIO5 MPIO4 MPIO3 MPIO2 MPIO1 MPIO0
M P IO 5 M P IO 4 M P IO 3 M P IO 2 M P IO 1 M P IO 0
M P IO 5 M P IO 4 M P IO 3 M P IO 2 M P IO 1 M P IO 0
M P IO 5 M P IO 4 M P IO 3 M P IO 2 M P IO 1 M P IO 0
M PIO L VL R egister
MPIOSEL Register
M PIO INV Register
M PIO 3T Register
19
5V PCI BUS DUAL UART
XR17C152