USB Registers
16.5.4.2 RX_CALIB Register (offset = 4h) [reset = 0h]
RX_CALIB is shown in
and described in
.
Contains bits related to RX calibration
Figure 16-135. RX_CALIB Register
31
30
29
28
27
26
25
24
RESTART_HSRX_CA USE_HS_OFF_REG
HS_OFF_CODE
L
R/W-0h
R/W-0h
R/W-0h
23
22
21
20
19
18
17
16
HSRX_COMP_OUT
HSRX_CAL_DONE
USE_SQ_OFF_DAC1
SQ_OFF_CODE_DAC1
R-0h
R-0h
R/W-0h
R/W-0h
15
14
13
12
11
10
9
8
SQ_OFF_CODE_DA USE_SQ_OFF_DAC2
SQ_OFF_CODE_DAC2
USE_SQ_OFF_DAC3
C1
R/W-0h
R/W-0h
R/W-0h
R/W-0h
7
6
5
4
3
2
1
0
SQ_OFF_CODE_DAC3
SQ_COMP_OUT
SQ_CAL_DONE
RESTART_SQ_CAL
R/W-0h
R-0h
R-0h
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 16-146. RX_CALIB Register Field Descriptions
Bit
Field
Type
Reset
Description
31
RESTART_HSRX_CAL
R/W
0h
Restart the HSRX calibration state machine when this bit goes from
0 to 1.
30
USE_HS_OFF_REG
R/W
0h
Override HS offset correction with HS_OFF_CODE when set to '1'
29-24
HS_OFF_CODE
R/W
0h
HS offset code, this code is forced when bit 30 is 1 .
Code is updated from calibration logic when bit
30 = 0.
23
HSRX_COMP_OUT
R
0h
The output of the HSRX comparator.Read value is valid only if
VDDLDO is on.
22
HSRX_CAL_DONE
R
0h
Signal that indicates that the HSRX calibration is done.
This gets reset at every restart.Read value is valid only if VDDLDO
is on.
21
USE_SQ_OFF_DAC1
R/W
0h
Override Squelch offset DAC1 code when '1'
20-15
SQ_OFF_CODE_DAC1
R/W
0h
When read returns current Sq offset code for DAC1, if VDDLDO is
on.
When written this is used as Sq offset code for DAC1 when
USE_SQ_OFF_DAC
1 = '1'
14
USE_SQ_OFF_DAC2
R/W
0h
Override Squelch offset DAC2 code when '1'
13-9
SQ_OFF_CODE_DAC2
R/W
0h
When read returns current Sq offset code for DAC2, if VDDLDO is
on.
When written this is used as Sq offset code for DAC2 when
USE_SQ_OFF_DAC
2 = '1'
8
USE_SQ_OFF_DAC3
R/W
0h
Override Squelch offset DAC3 code when '1'
7-3
SQ_OFF_CODE_DAC3
R/W
0h
When read returns current Sq offset code for DAC3, if VDDLDO is
on.
When written this is used as Sq offset code for DAC3 when
USE_SQ_OFF_DAC
3 = '1'
2
SQ_COMP_OUT
R
0h
Sq comp output.Read value is valid only if VDDLDO is on.
1904
Universal Serial Bus (USB)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated