XR17V352IB-0A-EVB Datasheet, PDF (27/64 Pages) Exar Corporation – HIGH PERFORMANCE DUAL PCI EXPRESS UART

XR17V352
REV. 1.0.4
HIGH PERFORMANCE DUAL PCI EXPRESS UART
MPIOSEL [15:0](default 0xFF)
The MPIOSEL register defines the MPIOs as either an input or output. A logic 1 (default) defines the pin for
input and a logic 0 for output.
MPIOSEL Register
Multipurpose Input/Output Selection
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
MPIO7 MPIO6 MPIO5 MPIO4 MPIO3 MPIO2 MPIO1 MPIO0
MPIOOD [15:0] (default 0x00)
The MPIO outputs can behave as an open-drain output by the MPIOOD register. When the MPIOOD register is
a logic 0 (default), the MPIO is not an open-drain output. A logic 1 enables the MPIO as an open-drain output.
This register has no effect, when the MPIO is an input.
MPIOOD Register
Multipurpose Open-Drain Output Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
MPIO7 MPIO6 MPIO5 MPIO4 MPIO3 MPIO2 MPIO1 MPIO0
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