IDT 8A3 Series - PWM_ENCODER_0.PWM_ENCODER_SIGNATURE

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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]

IDT 8A3 Series - PWM_ENCODER_0.PWM_ENCODER_SIGNATURE_0