XR17V352 Datasheet, PDF (25/64 Pages) Exar Corporation – HIGH PERFORMANCE DUAL PCI EXPRESS UART

PRELIMINARY
XR17V352
REV. P1.0.1
HIGH PERFORMANCE DUAL PCI EXPRESS UART
There are 2 sets of 6 registers that select, control and monitor the 16 multipurpose inputs and outputs.
Figure 8 shows the internal circuitry.
FIGURE 8. MULTIPURPOSE INPUT/OUTPUT INTERNAL CIRCUIT
MPIOINT [15:0]
IN T
AND
Rising Edge
AND
D e te c tio n
MPIOLVL [15:0]
Read Input Level
MPIOINV [15:0]
(Input Inversion Enable =1)
MPIOLVL [15:0]
(O utput Level)
MPIOOD [15:0]
(Open-Drain Enable =1)
MPIO3T [15:0]
(3-state Enable =1)
MPIO SEL [15:0]
(Select Input=1, Output=0 )
AND
1
0
OR
M P IO
Pin [15:0]
25