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FUSB302BVMPX датащи(PDF) 9 Page - ON Semiconductor |
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FUSB302BVMPX датащи(HTML) 9 Page - ON Semiconductor |
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9 / 32 page ![]() FUSB302B www.onsemi.com 9 Figure 9. HOST_CUR Changed prior to Attach CC HIGH CURRENT SETTING MED CURRENT SETTING 0 V ATTACH DEFAULT CURRENT The Type-C specification outlines different attach and detach thresholds for a Type-C host that are based on how much current is supplied to each CC pin. Based on the programmed HOST_CUR setting, the software adjusts the DAC comparator threshold to match the Type-C specification requirements. The BC_LVL comparators can also be used as part of the Ra detection flow. This is summarized in Table 6. Table 6. HOST INTERRUPT SUMMARY Termination HOST_CUR[1:0] Interrupt Status Attach/Detach BC_LVL[1:0] COMP COMP Setting Ra 2’b01 2’b00 NA NA NA 2’b10 2’b01 0 6’b00_1010 (0.42 V) 2’b11 2’b10 0 6’b01_0011 (0.8 V) Rd 2’b01, 2’b10 NA 0 6’b10_0110 (1.6 V) Attach NA 1 6’b10_0110 (1.6 V) Detach 2’b11 NA 0 6’b11_1110 (2.6 V) Attach NA 1 6’b11_1110 (2.6 V) Detach The high level software flow diagram for a Type-C Host (SRC) is shown below in Figure 10. |
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