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USB Low-Full-High Speed Peripherals

Contributor II

Hi,

In the FX2LP TRM,They have given that IFCONFIG.5 (output enable) Bit must not be set to 1 when IFCONFIG.7 is equal to 0 (external clock).what whould be the reason?

regards,

geetha.

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Moderator
Moderator

Hello Geethanjali,

When IFCLK source is configured to be external (IFCONFIG.7 = 0), the IFCLK pin acts as an Input pin. So, this pin cannot simultaneously drive the IFCLK. Hence, the output enable bit (IFCONFIG.5) should be set to 0 when the IFCLK source is external.

Best regards,

Srinath S

View solution in original post

1 Reply
Moderator
Moderator

Hello Geethanjali,

When IFCLK source is configured to be external (IFCONFIG.7 = 0), the IFCLK pin acts as an Input pin. So, this pin cannot simultaneously drive the IFCLK. Hence, the output enable bit (IFCONFIG.5) should be set to 0 when the IFCLK source is external.

Best regards,

Srinath S

View solution in original post