ZHCSKM0J November 2009 – July 2021 TUSB1210
PRODUCTION DATA
In this mode, a reference clock must be externally provided on the REFCLK pin. When an input clock is detected on the REFCLK pin, then CLK is automatically changed to an output. For example, 60 MHz ULPI clock is the TUSB1210 devices output on the CLK pin.
Two reference clock input frequencies are supported. REFCLK input frequency is communicated to TUSB1210 through a configuration pin, CFG. See fREFCLK in Table 8-3 for frequency correspondence. TUSB1210 supports square-wave reference clock input only. Reference clock input must be square-wave of amplitude in the range 3 V to 3.6 V. See Section 6.13.