PDP83TG720SWCSTQ1 datasheet(31/199 Pages) TI

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Table 7-2. Datapath BIST Programming (continued)

Loopback

Mode

To enable

loopback

mode

To enable data

generator and

checker : MAC

packets

To check in-

coming MAC

packets status

To enable data

generator and

checker :

PRBS stream

To check in-

coming PRBS

status : PRBS

stream

Other care-

abouts

SGMII Reverse

loopback

•

write :

reg[0x042C]

= 0x0010

•

write :

reg[0x0619

]=0x1115

•

write :

reg[0x0624

]=0x55BF

•

read :

reg[0x063C]

for [15:0] of

total

received

packets

count.

•

read :

reg[0x063D]

for [31:16]

of total

received

packets

count.

•

read :

reg[0x063E]

for Packets

received

with CRC

errors

•

write :

reg[0x0619

]=0x0557

•

write :

reg[0x0624

]=0x55BF

Step 1 : write :

reg[0x0620][1]

= 1'b1

Step 2 :

•

read :

reg[0x0620]

[7:0] for

Number of

error bytes

received.

•

read :

reg[0x0620]

[8] (1

indicates

PRBS data

is coming in

and checker

is locked)

•

Generated

data will be

going to Cu

cable side,

to disable

this

transmissio

n : write

reg[0x041F]

= 0x1000

Note : Different MAC packet parameters can be further configured with register[0x061B] and register[0x0624]

7.3.1.4 Temperature and Voltage Sensing

Temperature sensor of PHY can be used to give the indication of the temperature of the system and reading can

be taken on the fly by reading the temperature sensor output register.

Voltage sensor senses the voltage of all the supply pins : vdda, vddio and vdd1p0. Each pins active voltage can

be sensed by reading the corresponding voltage sensor output register.

All sensors are always active and monitor state machine polls the value of each sensor periodically. Monitor

state machine can be further programmed to give higher priority/sampling time to one sensor over another by

using MONITOR_CTRL_3 register.

Following software sequence can be used to read out any sensor's output :

• Step1 : Program register[0x0467] = 0x6004 ; Initial configuration of monitors

• Step 2 : Program register [0x046A] = 0x00A6 and then register [0x046A]=0x00A3; Refresh the monitors

• Step 3 : Program register[0x0468] to select the corresponding sensor to be polled and read register [0x047B]

[14:7] for selected sensor's output code.

• Step 4 : Feed the values of read sensor's output code (in decimal) in following equations to get the sensor's

output value in decimals. Refer to Sensor Select Table for required value of constants to be used in

equations :

– vdda_value = 3.3 + (vdda_output_code - vdda_output_mean_code)*slope_vdda_sensor

– vdd1p0_value = 1.0 + (vdd1p0_output_code - vdd1p0_ouput_mean_code)*slope_vdd1p0_sensor

– vddio_calculated = 3.3 + (vddio_ouput_code - vddio_output_mean_code)*slope_vddio_sensor

– temperature_calculated

(temperature_output_code

temperature_output_mean_code)*slope_temperature_sensor

Table 7-3. Sensor Select Table

Sensor Selected To Read-out

0x1920

VDDA Voltage Sensor

0x2920

VDD1P0 Voltage Sensor

0x3920

VDDIO Voltage Sensor

www.ti.com

DP83TG720S-Q1

SNLS604 – SEPTEMBER 2020

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