ZHCSQL1 May 2022 DP83TC813R-Q1 , DP83TC813S-Q1
PRODUCTION DATA
Test mode 4 evaluates the transmitter distortion. In test mode 4, the DP83TC813-Q1 transmits the sequence of symbols generated by Equation 1:
The bit sequences, x0n and x1n, are generated from combinations of the scrambler in accordance to Equation 2 and Equation 3:
Example streams of the 3-bit nibbles are shown in Table 8-3.
x1n | x0n | PAM3 SYMBOL |
---|---|---|
0 | 0 | 0 |
0 | 1 | +1 |
1 | 0 | 0 |
1 | 1 | –1 |
Test mode 4 is enabled by setting bits[15:13] = 0b100 in MMD1_PMA_TEST_MODE_CTRL Register (0x1836).