Datasheet
DS32EL0421, DS32ELX0421
www.ti.com
SNLS282F –MAY 2008–REVISED APRIL 2013
Register Map
The register information for the serializer is shown in the table below. Some registers have been omitted or
marked as reserved; these are for internal testing and should not be written to. Some register bits require an
override bit to be set before they can be written to.
Addr Name Bits Field R/W Default Description
(Hex)
00 Device ID 7:1 SMBus Address R/W 57'h Some systems will use all 8 bits as the device ID. This will
shift the value from 57’h to AE’h
0 Reserved 0
01 Reset 7:5 Reserved 0
4 Analog Disable R/W 0 1: Disables analog blocks. Power save feature
3:1 Reserved 0
0 Software Reset 0 1: Reset the device. Does not affect device ID.
02 GPIO0 Config 7:4 GPIO0 Mode R/W 0 0000: GP out register
0001: Link loss indicator
0011: TxCLKIN loss of signal
0100: TxCLKIN detect
All others: Reserved
3:2 GPIO0 R Enable R/W 01'b 00: Pullup/down disabled
01: Pulldown enabled
10: Pullup enabled
11: Reserved
1 Input Enable R/W 0 0: Input buffer disabled
1: Input buffer enabled
0 Output Enable R/W 1'b 0: OutputTtri-State™
1: Output enabled
03 GPIO1 Config 7:4 GPIO1 Mode R/W 0 0000: Power on reset
0001: GP out register
0010: PLL lock indicator
0011: TxIN0 loss of signal
0100: TxIN1 loss of signal
0101: TxIN2 loss of signal
0110: TxIN3 loss of signal
0111: TxIN4 loss of signal
All others: Reserverd
3:2 GPIO1 R Enable R/W 01'b 00: Pullup/down disabled
01: Pulldown enabled
10: Pullup enabled
11: Reserved
1 Input Enable R/W 0 0: Input buffer disabled
1: Input buffer enabled
0 Output Enable R/W 1'b 0: Output Tri-State™
1: Output enabled
04 GPIO2 Config 7:4 GPIO2 Mode R/W 0 0000: GP out register
0001: Always on clock out
0010: Parallel-to-serial clock out
0100: Digital clock out
All others: Reserverd
3:2 GPIO2 R Enable R/W 01'b 00: Pullup/down disabled
01: Pulldown enabled
10: Pullup enabled
11: Reserved
1 Input Enable R/W 0 0: Input buffer disabled
1: Input buffer enabled
0 Output Enable R/W 1'b 0: Output Tri-State™
1: Output enabled
Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Links: DS32EL0421 DS32ELX0421