SNLA425A february   2023  – june 2023 DS160PR1601 , DS320PR1601

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Access Methods
    1. 1.1 Typical PCIe x16 Lane to DS160PR1601 and DS320PR1601 Channel Mapping
    2. 1.2 Device Configuration Through External EEPROM
  5. 2Register Mapping
    1. 2.1 Share Registers
    2. 2.2 Channel Registers
  6. 3Equalization Control Settings
  7. 4CTLE Index and Flat Gain Selection Matrix
  8. 5Programming Examples
  9. 6References
  10. 7Revision History

1.1 Typical PCIe x16 Lane to DS160PR1601 and DS320PR1601 Channel Mapping

The example below demonstrates the PCIe lane to DS160PR1601/DS320PR1601 channel mapping in a typical PCIe x16 application using the DS160PR1601 or DS320PR1601.

Table 1-2 Downstream: CPU -> DS160PR1601/DS320PR1601 A-Side -> Endpoint
PCIe Lane DS160PR1601 Channel I2C ADDR CONFIG PINS Channel Bank Example I2C Address Bank Channel# PD Pin Control
0 A_PEx0 A_ADDR1_7-0 {Example Pin State = L0} A_ADDR0_7-0 {Example Pin State = L0} 0 18h 0 PD_3_0
1 A_PEx1 18h 1 PD_3_0
2 A_PEx2 18h 2 PD_3_0
3 A_PEx3 18h 3 PD_3_0
4 A_PEx4 1 19h 4 PD_7_4
5 A_PEx5 19h 5 PD_7_4
6 A_PEx6 19h 6 PD_7_4
7 A_PEx7 19h

7

PD_7_4
8 A_PEx8 A_ADDR1_15-8 {Example Pin State = L0} A_ADDR0_15-8 {Example Pin State = L1} 0 1Ah 0 PD_11_8
9 A_PEx9 1Ah 1 PD_11_8
10 A_PEx10 1Ah 2 PD_11_8
11 A_PEx11 1Ah 3 PD_11_8
12 A_PEx12 1 1Bh 4 PD_15_12
13 A_PEx13 1Bh 5 PD_15_12
14 A_PEx14 1Bh 6 PD_15_12
15 A_PEx15 1Bh 7 PD_15_12
Table 1-3 Upstream: Endpoint-> DS160PR1601/DS320PR1601 B-Side -> CPU
PCIe Lane DS160PR1601 Channel I2C ADDR CONFIG PINS Channel Bank Example I2C Address Bank Channel# PD Pin Control
0 B_PEx0 B_ADDR1_7-0 {Example Pin State = L0} B_ADDR0_7-0 {Example Pin State = L2} 1 1Dh 7 PD_7_4
1 B_PEx1 1Dh 6 PD_7_4
2 B_PEx2 1Dh 5 PD_7_4
3 B_PEx3 1Dh 4 PD_7_4
4 B_PEx4 0 1Ch 3 PD_3_0
5 B_PEx5 1Ch 2 PD_3_0
6 B_PEx6 1Ch 1 PD_3_0
7 B_PEx7 1Ch 0 PD_3_0
8 B_PEx8 B_ADDR1_15-8 {Example Pin State = L0} B_ADDR0_15-8 {Example Pin State = L3} 1 1Fh 7 PD_15_12
9 B_PEx9 1Fh 6 PD_15_12
10 B_PEx10 1Fh 5 PD_15_12
11 B_PEx11 1Fh 4 PD_15_12
12 B_PEx12 0 1Eh 3 PD_11_8
13 B_PEx13 1Eh 2 PD_11_8
14 B_PEx14 1Eh 1 PD_11_8
15 B_PEx15 1Eh 0 PD_11_8