LMH0340SQE/NOPB National Semiconductor, LMH0340SQE/NOPB Datasheet - Page 18

• Manufacturer Part Number: LMH0340SQE/NOPB
• Description: IC SERIALIZER HD/SD SDI 48-LLP
• Manufacturer: National Semiconductor

Specifications of LMH0340SQE/NOPB

• Applications: Video Equipment
• Interface: SMBus (2-Wire/I²C)
• Voltage - Supply: 2.5V, 3.3V
• Package / Case: 48-LLP
• Mounting Type: Surface Mount
• Ic Interface Type: Parallel
• Supply Voltage Range: 2.375V To 3.465V
• Power Dissipation Pd: 475mW
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LLP
• No. Of Pins: 48
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMH0340SQE; LMH0340SQE; LMH0340SQETR

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Register Descriptions
The following table provides details on the device's configu-
ration registers.
SER Register Detail Table
ADD
'h
00
01
02
Name
device_identificatio
n
reset
GPIO_0
Configuration
Bits
The seven MSBs of this register define the SMBus address for the device – the default value is
0x57'h, but this may be overwritten. The LSB of this register must always be ‘0’ Note that since
the address is shifted over by 1 bit, some systems may address the 57'h as AE'h.
7:1
0
If a ‘1’ is written to bit 0 (LSB) of this register the device will do a soft reset, restoring it’s internal
state to the same as at powerup except device_id register. Once the reset operation is complete,
the value in this register is reset to ‘0’
Bit 4 of this register has a default of 0, if a ‘1’ is written to this location it will disable the analog
output buffer of the device, allowing for some power savings.
7:5
4
3:1
0
This register configures GPIO_0. 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
Field
device id
Reserved
Reserved
Analog Dis
Reserved
sw_rst
GPIO_0_mode[3:0]
GPIO_0_ren[1:0]
GPIO_0_sleepz
GPout0 enable
18
R/W
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Default
57'h
0'b
0'b
0'b
0000'b
01'b
0'b
1'b
Description
SMBus device ID
Disables Analog
software reset
0000: GPout register
0011: TXCLK LOS
0100: TXCLK Detect
0110: Power On Reset
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-STATE
1: output enabled