SDXILEVK/NOPB National Semiconductor, SDXILEVK/NOPB Datasheet - Page 19

• Manufacturer Part Number: SDXILEVK/NOPB
• Description: SDI EVAL BOARD FOR XILINX
• Manufacturer: National Semiconductor
• Series: -r

Specifications of SDXILEVK/NOPB

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ADD
'h
03
04
05
06
07–10
Name
GPIO_1
Configuration
GPIO_2
Configuration
GP INPUT
GP OUTPUT
Reserved
Bits
This register configures GPIO_1. Note, if this pin is to be used as an input, then the output must
be TRI-STATE (bit[0]=’0’) and if used as an output, then the input buffer must be disabled (bit[1]
=’0’).
7:4
3:2
1
0
This register configures GPIO_2. Note, if this pin is to be used as an input, then the output must
be TRI-STATE (bit[0]=’0’) and if used as an output, then the input buffer must be disabled (bit[1]
=’0’).
7:4
3:2
1
0
If any of the GPIO pins are configured as inputs, then reading from this register provides the
values on those input pins.
7:3
2
1
0
If the GPIO pins are configured as general purpose output pins, then writing to this register has
the effect of transferring the bits in this register to the output buffers of the appropriate GPIO pins.
7:3
2
1
0
Field
GPIO_1_mode[3:0]
GPIO_1_ren[1:0]
GPIO_1_sleepz
GPout1 enable
GPIO_2_mode[3:0]
GPIO_2_ren[1:0]
GPIO_2_sleepz
GPout2 enable
Reserved
Reserved
19
R/W
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r
r
r
r/w
r/w
r/w
Default
0000'b
01'b
0'b
1'b
0000'b
01'b
0'b
0'b
0'b
0'b
0'b
Description
0000: Power On Reset
0001: GPout register
0010: pll lock
0100: Data LOS [0]
0101: Data LOS [1]
0110: Data LOS [2]
0111: Data LOS [3]
1000: Data LOS [4]
all others: reserved
00: pullup and pulldown disabled
01: pulldown enabled
10: pullup enabled
11: Reserved
0: input buffer disabled
1: input buffer enabled
0: output in TRI-STATE mode
1: output enabled
0000: GPout register
0001: always on out
0010: parallel to serial clk out
0011: parallel clock output
0100: TXCLK Digital out
all others: reserved
00: pullup and pulldown disabled
01: pulldown enabled
10: pullup enabled
11: Reserved
0: input buffer disabled
1: input buffer enabled
0: output TRI-STATEd
1: output enabled
input data on GPIO_2
input data on GPIO_1
input data on GPIO_0
output data on GPIO_2
output data on GPIO_1
output data on GPIO_0
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