IDT 89HPES48T12G2, User Manual, Page: 88 / 276

IDT SerDes
PES48T12G2 User Manual 7 - 6 April 5, 2013
Notes
Table 7.3 shows a number of possible settings for the drive, de-emphasis, and slew rate controls in
Gen2 mode with -3.5dB de-emphasis.
1
The default setting is highlighted.
Transmit Levels
Settings of Relevant Fields in the S[x]TXLCTL0 &
S[x]TXLCTL1 registers
Drive
Level
De-
empha-
sis
De-
empha-
sized
Level
TDVL_
FS3DBG1
TX_EQ_
3DBG1
CDC_
FS3DBG1
FDC_
FS3DBG1
TX_SLEW
_G1
959 -3.6 636 0x1C 0x2 0x3 0x3 0x2
959 -3.6 636 0x1B 0x2 0x3 0x4 0x2
958 -3.6 636 0x1A 0x2 0x3 0x4 0x2
957 -3.6 635 0x19 0x2 0x3 0x4 0x2
956 -3.6 635 0x18 0x2 0x3 0x4 0x2
949 -3.5 631 0x17 0x2 0x3 0x4 0x2
942 -3.5 628 0x16 0x2 0x3 0x4 0x2
935 -3.5 624 0x15 0x2 0x3 0x4 0x2
928 -3.5 620 0x14 0x2 0x3 0x4 0x2
902 -3.5 602 0x13 0x2 0x3 0x4 0x2
877 -3.5 584 0x12 0x2 0x3 0x4 0x2
851 -3.6 566 0x11 0x2 0x3 0x4 0x2
825 -3.6 547 0x10 0x2 0x3 0x4 0x2
789 -3.5 525 0x0F 0x2 0x3 0x3 0x2
753 -3.5 503 0x0E 0x2 0x3 0x3 0x2
716 -3.5 481 0x0D 0x2 0x3 0x3 0x2
680 -3.4 459 0x0C 0x2 0x3 0x3 0x2
638 -3.4 431 0x0B 0x2 0x3 0x2 0x2
596 -3.4 403 0x0A 0x2 0x3 0x2 0x2
554 -3.4 374 0x09 0x2 0x3 0x2 0x2
512 -3.4 346 0x08 0x2 0x3 0x2 0x2
465 -3.4 314 0x07 0x2 0x3 0x2 0x2
419 -3.5 281 0x06 0x2 0x3 0x2 0x2
372 -3.5 248 0x05 0x2 0x3 0x2 0x2
325 -3.6 216 0x04 0x2 0x3 0x2 0x2
274 -3.6 182 0x03 0x2 0x3 0x1 0x2
224 -3.6 148 0x02 0x2 0x3 0x1 0x2
173 -3.6 115 0x01 0x2 0x3 0x1 0x2
122 -3.6 81 0x00 0x2 0x3 0x1 0x2
Table 7.2 SerDes Transmit Driver Settings in Gen1 Mode