FSUSB242UCX−Z002

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4

System Block Diagrams

Figure 4. Application of 2x USB HS interface

When 2x UART signals are switched over FSUSB242, both 100 ohm series resistor and 1 nF bypass capacitors are recommended

in the common switch path as above. If FSUSB242 is used to switch USB and UART signals, connect UART signals to HSD1.

USB HS 1

USB HS 2

HSD 1+

HSD 1−

HSD 2+

HSD 2−

HSD+

HSD−

FSUSB 242

Type−C

connector

Processor

SEL

GND

2.7~ 5.5V

D+

D−

VDD

D+

D−

D+

D−

GPIO

USB HS

UART

HSD 1+

HSD 1−

HSD 2+

HSD 2−

HSD+

HSD−

FSUSB 242

Type−C

connector

Processor

SEL

GND

2.7 ~ 5.5 V

D+

D−

VDD

RxD

TxD

D+

D−

GPIO

Figure 5. Application of UART and USB HS interface

UART 1

UART 2

HSD 1+

HSD 1−

HSD 2+

HSD 2−

HSD+

HSD −

FSUSB 242

Type−C

connector

Processor

SEL

GND

2.7 ~ 5.5 V

D+

D−

VDD

RxD

TxD

RxD

TxD

GPIO

1nF

1nF

100

100

Figure 6. Application of 2x UART interface