Table 2-22. Switch settings (continued)
Switch Supported function Description
CFG_SPREAD • 0: 100 MHz clocks for PCIe slots are fixed (default setting)
• 1: 100 MHz clocks for PCIe slots are spread-spectrum modulated
SW2[2] CS4223 configuration
CFG_40GE_ROM
SW_P40IN
• 0: CS4223 40 GbE PHY is not self-configured (default setting)
• 1: CS4223 40 GbE PHY is self-configured on reset
SW2[3] PCIe slot clock enable
CFG_CLKEN_SLOT[1:2]_B
SW_SLOTCLK
• 0: PCIe slots are clocked only when a card is installed (default setting)
• 1: PCIe slots are clocked always
SW2[4] CS4223 MDC clock
generation
SW_MDC40G_EN
• 0: CS4223 does not receive clock during PORESET_B (default setting)
• 1: CS4223 receives ~1 MHz clock during PORESET_B
SW2[5] SDHC voltage control SW_SDHC_VCTL
• 0: EVDD switches between 1.8 V and 3.3 V as required (default
setting)
• 1: EVDD locked to 1.8 V only. Only low-voltage (LV) SDHC cards are
supported in this mode.
SW2[6] Unused
CFG_ENG_USE0
SW_ENGUSE0
Reserved with 1 as the default setting
SW2[7] Unused
CFG_ENG_USE1
SW_ENGUSE1
Reserved with 1 as the default setting
SW2[8] DDR clock source selection
CFG_ENG_USE2
SW_ENGUSE2
•
0: DDR clocked from DDRCLK pin (default setting)
• 1: DDR clocked from differential SYSCLK
SW3[1:3] Device type selection
TEST_SEL_B,
CFG_SVR[0:1]
SW_TESTSEL_B + SW_SVR[0:1]
•
011: LX2120A/E
• 101: LX2080C/E
• 111: LX2160A/E (default setting)
• All other values are reserved
SW3[4] SoC use
CFG_SOC_USE
SW_SOCUSE
•
1: Normal mode (default setting)
NOTE:
Do not change the default setting of this switch.
SW3[5:6] CPU device override SW_CPU_SEL
•
00: Override to LS2-family device
• 01: Override to LX2-family device
• 10: Reserved
• 11: Reserved (default setting)
NOTE:
This switch's settings are ignored if SW3[7] is set to 0.
SW3[7] Force CPU selection SW_CPU_FORCE
•
0: Normal mode (default setting)
• 1: Use SW_CPU_SEL instead of CPU_ID
NOTE:
Do not change the default setting of this switch.
SW3[8] Unused Reserved with 0 as the default setting
SW4[1] Bypass mode SW_BYPASS_B
Table continues on the next page...
Chapter 2 LX2160ARDB Functional Description
QorIQ LX2160A Reference Design Board Reference Manual, Rev. 0, 09/2018
NXP Semiconductors 57
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