DAC JESD Register Map
265
SBAU337 – May 2020
Copyright © 2020, Texas Instruments Incorporated
Serial Interface Register Maps
2.4.5 Register 24h (offset = 24h) [reset = 5Eh]
Figure 2-234. Register 24h
7
6
5
4
3
2
1
0
SERDESFIFO_
INIT_STATE_O
VR
GEARBOX_INI
T_STATE_OVR
SERDES_DAT
A_FLIP
SPI_TXENABL
E
FIFO_ERROR_
ZEROS_DATA
_ENA
ZERO_INVALI
D_DATA
ALARM_ZERO
S_JESD_DATA
_ENA
LINK_CONFIG
_ACROSS_2T_
INSTANCES
R/W-0h
R/W-1h
R/W-0h
R/W-1h
R/W-1h
R/W-1h
R/W-1h
R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-238. Register 24 Field Descriptions
Bit
Field
Type
Reset
Description
7-7
SERDESFIFO_INI
T_STATE_OVR
R/W
0h
Need to be set along with
serdesfifo_init_state_lane0/1/2/3_val. Override lanes[0:3]/[4:7]
sysref based gearbox init_state with spi-based init_state
0 : no override
1 : override
6-6
GEARBOX_INIT_S
TATE_OVR
R/W
1h
Need to be set along with gearbox_init_state_lane0/1/2/3_val.
Override lanes[0:3]/[4:7] sysref based gearbox init_state with
spi-based init_state
0 : no override
1 : override
5-5
SERDES_DATA_F
LIP
R/W
0h
Flip the serdes incoming 32-bit data
0 : no-flip
1 : flip
4-4
SPI_TXENABLE
R/W
1h
UNUSED
3-3
FIFO_ERROR_ZE
ROS_DATA_ENA
R/W
1h
When asserted FIFO errors zero the data out of the JESD
block. For test purposes this could be turned off to allow test
patterns in the FIFO.
2-2
ZERO_INVALID_D
ATA
R/W
1h
When asserted, the data from the JESD block is zeroed in the
mapper to prevent goofy output from the DAC. For test
purposes this bit should be desasserted, but in normal use
cases this bit should be a '1'
1-1
ALARM_ZEROS_J
ESD_DATA_ENA
R/W
1h
When asserted any alarm that isnt masked will zero the data
coming out of the JESD lane block.
0-0
LINK_CONFIG_AC
ROSS_2T_INSTAN
CES
R/W
0h
TESTMODE
2.4.6 Register 25h (offset = 25h) [reset = FFh]
Figure 2-235. Register 25h
7
6
5
4
3
2
1
0
SERDESFIFO_
INIT_STATE_L
ANE3_VAL
SERDESFIFO_
INIT_STATE_L
ANE2_VAL
SERDESFIFO_
INIT_STATE_L
ANE1_VAL
SERDESFIFO_
INIT_STATE_L
ANE0_VAL
GEARBOX_INI
T_STATE_LAN
E3_VAL
GEARBOX_INI
T_STATE_LAN
E2_VAL
GEARBOX_INI
T_STATE_LAN
E1_VAL
GEARBOX_INI
T_STATE_LAN
E0_VAL
R/W-1h
R/W-1h
R/W-1h
R/W-1h
R/W-1h
R/W-1h
R/W-1h
R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-239. Register 25 Field Descriptions
Bit
Field
Type
Reset
Description
7-7
SERDESFIFO_INI
T_STATE_LANE3_
VAL
R/W
1h
Override lane3/7 sysref based serdesfifo init_state with spi-
based init_state. To be used along with
serdesfifo_init_state_ovr.
0 : no override
1 : override