USB Registers
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16.5.4.2 RX_CALIB Register (offset = 4h) [reset = 0h]
RX_CALIB is shown in Figure 16-135 and described in Table 16-146.
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
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