Intel Arria 10 User Manual page 278

Attribute Default value in PCIe
Controlled by coefficients
pre_emp_swit
on the port
ching_ctrl_p
pipe_g3_txdeemph
re_tap_1t
0x107[4:0]
negative
pre_emp_sign
_pre_tap_1t
0x107[5]
Controlled by coefficients
vod_output_s
on the port
wing_ctrl
pipe_g3_txdeemph
0x109[4:0]
Controlled by coefficients
pre_emp_swit
on the port
ching_ctrl_1
pipe_g3_txdeemph
st_post_tap
0x105[4:0]
Negative
pre_emp_sign
_1st_post_ta
p 0x105[6]
Note:
You must set the attribute
0x105[7] back to 1'b1 to allow the Arria 10 PCI Express PIPE design to listen to the
port
pipe_g3_txdeemph[17:0]
Table 199. Manual tunning of RX analog settings for PCIe channels
To manually tune RX channels of the Arria 10 PCI Express designs using TTK/System Console/Reconfiguration
Interface, you must set the following attribute
Attribute Default value in PCIe
1'b1
rrx_pcie_eqz
0x161[2]
1'b0
adp_4s_ctle_
bypass
0x167[0]
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Intel Arria 10 Transceiver PHY User Guide
278
Value to be set to use TTK/
mode System Console
Depends on value set by
pre_emp_switching_ctrl_pre_
register setting
tap_1t
Depends on value set by
pre_emp_sign_pre_tap_1t
register
Depends on value set by
vod_output_swing_ctrl
setting
Depends on value set by
pre_emp_switching_ctrl_1st_
post_tap
Depends on value set by
pre_emp_sign_1st_post_tap
ister setting
user_fir_coeff_ctrl_sel
on each channel for normal PCIe operation.
Value to be set to use TTK/
mode System Console
1'b0
• 1'b0 for Gen3 for Adaptive 4S
CTLE
• 1'b1 for Gen1/Gen2 for Manual
4S CTLE
2. Implementing Protocols in Arria 10 Transceivers
Setting this mux affects VOD, pre
tap and post tap attributes
Sets 1st Pre tap value
•
Sets 1st Pre tap sign
•
setting
•
Output swing
register
•
Sets 1st Post tap value
•
register setting
Set 1st Post tap sign
reg
•
•
located at register address
Mux to select between static vs
dynamic control
•
•
Setting this mux affects the CTLE 4s
gain and 1s gain values
Mux to select between CTLE 4S
manual mode vs adaptive mode
•
•
UG-01143 | 2018.06.15
Description
Direct mapped
- 1 negative (default for PCIe
mode)
0 positive
Direct mapped
Direct mapped
- 1 negative (default for PCIe
mode)
- 0 positive
Description
0 for static setting (use for
manual tuning)
1 for dynamic control (PCIe
mode)
0 for CTLE 4S adaptive mode
1 for CTLE 4S manual mode
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