FUSB302BMPX datasheet(9/32 Pages) ONSEMI

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FUSB302B

www.onsemi.com

Figure 9. HOST_CUR Changed prior to Attach

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

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

2’b01

2’b00

2’b10

2’b01

6’b00_1010 (0.42 V)

2’b11

2’b10

6’b01_0011 (0.8 V)

2’b01, 2’b10

6’b10_0110 (1.6 V)

Attach

6’b10_0110 (1.6 V)

Detach

2’b11

6’b11_1110 (2.6 V)

Attach

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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