LMH0340_08 Datasheet, PDF (17/24 Pages) National Semiconductor (TI) – 3G, HD, SD, DVB-ASI SDI Serializer and Driver with LVDS Interface

ADD
'h
03
Name
GPIO_1
Configuration
04
GPIO_2
Configuration
05
GP INPUT
06
GP OUTPUT
07–10 Reserved
Bits
Field
R/W Default Description
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
GPIO_1_mode[3:0] r/w
0000'b
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
3:2
GPIO_1_ren[1:0] r/w
01'b
00: pullup and pulldown disabled
01: pulldown enabled
10: pullup enabled
11: Reserved
1
GPIO_1_sleepz
r/w
0'b
0: input buffer disabled
1: input buffer enabled
0
GPout1 enable
r/w
1'b
0: output in TRI-STATE mode
1: output enabled
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
GPIO_2_mode[3:0] r/w
0000'b
0000: GPout register
0001: always on out
0010: parallel to serial clk out
0011: parallel clock output
0100: TXCLK Digital out
all others: reserved
3:2
GPIO_2_ren[1:0] r/w
01'b
00: pullup and pulldown disabled
01: pulldown enabled
10: pullup enabled
11: Reserved
1
GPIO_2_sleepz
r/w
0'b
0: input buffer disabled
1: input buffer enabled
0
GPout2 enable
r/w
0'b
0: output TRI-STATEd
1: output enabled
If any of the GPIO pins are configured as inputs, then reading from this register provides the
values on those input pins.
7:3
Reserved
2
r
input data on GPIO_2
1
r
input data on GPIO_1
0
r
input data on GPIO_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
Reserved
2
r/w
0'b
output data on GPIO_2
1
r/w
0'b
output data on GPIO_1
0
r/w
0'b
output data on GPIO_0
17
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