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©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
PWM_ENCODER_0.PWM_ENCODER_SIGNATURE_0
Select signature symbols to be transmitted in PWM signature mode. Same signature must be applied at both encoder and decoder.
PWM_ENCODER_0.PWM_ENCODER_CNFG Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
RESERVED
N/A
-
This field must not be modified from the read value
PPS_SEL[3]
R/W
0
Select source to trigger transmission of
PWM PPS frame.
For dual-channel PWM encoders[0:3], a value of 0 means that TOD engine
selected in tod_sel field is used as a trigger source, a value of 1 means that the
output not used for PWM carrier is used as a trigger source.
For single-channel PWM encoders[4:7], a value of 1 indicates that the Q5
output divider is used as the PPS trigger source. Please note that in this case
you also need to set secondary_output = 1.
0 = ToD PPS
1 = alternate PPS
SECONDARY_OUTPUT[2]
R/W
0
Select output to be used for PWM carrier.
For dual-channel PWM encoders[0:3], a value of 1 indicates that the secondary
output is used for PWM carrier.
For single-channel PWM encoders[4:7], a value of 1 indicates that the Q5
output divider is used as the PPS source. Please note that in this case you also
need to set pps_sel = 1.
0 = primary output
1 = alternate output
TOD_SEL[1:0]
R/W
0
DPLL TOD index.
DPLL index from which the TOD PPS is to be used for transmission (when
pps_sel field = 0).
0 = ToD index 0
1 = ToD index 1
2 = ToD index 2
3 = ToD index 3
Table 341: PWM_ENCODER_0.PWM_ENCODER_SIGNATURE_0 Bit Field Locations and Descriptions
Offset
Address
(Hex)
PWM_ENCODER_0.PWM_ENCODER_SIGNATURE_0 Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
002h
FIFTH_SYMBOL[7:6]
SIXTH_SYMBOL[5:4]
SEVENTH_SYMBOL[3:2]
EIGHTH_SYMBOL[1:0]