ADC JESD Register Map
376
SBAU337 – May 2020
Copyright © 2020, Texas Instruments Incorporated
Serial Interface Register Maps
Table 2-504. Register 22 Field Descriptions
Bit
Field
Type
Reset
Description
7-3
0
R/W
0h
Must read or write 0
2-0
SYSREF_JESD_M
ODE
R/W
1h
Determines how SYSREF is used in the JESD synchronizing
block.
000 = Don't use SYSREF pulse
001 = Use all SYSREF pulses
010 = Use only the next SYSREF pulse
011 = Skip one SYSREF pulse then use only the next one
100 = Skip one SYSREF pulse then use all pulses.
101 = skip two SYSREFs and then use one
110 = skip two SYSREFs and then use all
2.5.4 Register 23h (offset = 23h) [reset = Fh]
Figure 2-500. Register 23h
7
6
5
4
3
2
1
0
0
0
0
0
LANE_ENA
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-Fh
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-505. Register 23 Field Descriptions
Bit
Field
Type
Reset
Description
7-4
0
R/W
0h
Must read or write 0
3-0
LANE_ENA
R/W
Fh
Turns on individual lanes:
bit 0 - STX1/5
bit 1 - STX2/6
bit 2 - STX3/7
bit 3 - STX4/8
2.5.5 Register 24h (offset = 24h) [reset = 0h]
Figure 2-501. Register 24h
7
6
5
4
3
2
1
0
0
0
0
0
JESD_CLEAR_DATA
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-506. Register 24 Field Descriptions
Bit
Field
Type
Reset
Description
7-4
0
R/W
0h
Must read or write 0
3-0
JESD_CLEAR_DA
TA
R/W
0h
Clears the JESD data going to serdes
1'b1 - Sends Test pattern Spi reg values on lane (No encoding
done, so no JESD STD is followed)
1'b0 - No change in lane-data
bit 0 - STX1/5
bit 1 - STX2/6
bit 2 - STX3/7
bit 3 - STX4/8