C8051F342 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F342

Full Speed USB Flash MCU Family

Silicon Laboratories 

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D

11.8. Software Reset

Software may force a reset by writing a ‘1’ to the SWRSF bit (RSTSRC.4). The SWRSF bit will read ‘1’ fol-

lowing a software forced reset. The state of the RST pin is unaffected by this reset.

11.9. USB Reset

Writing ‘1’ to the USBRSF bit in register RSTSRC selects USB0 as a reset source. With USB0 selected as

a reset source, a system reset will be generated when either of the following occur:

1. RESET signaling is detected on the USB network. The USB Function Controller (USB0) must

be enabled for RESET signaling to be detected. See Section “16. Universal Serial Bus Con-

troller (USB0)” on page 159 for information on the USB Function Controller.

2. The voltage on the VBUS pin matches the polarity selected by the VBPOL bit in register

REG0CN. See Section “8. Voltage Regulator (REG0)” on page 69 for details on the VBUS

detection circuit.

The USBRSF bit will read ‘1’ following a USB reset. The state of the RST pin is unaffected by this reset.

104

Rev. 1.3

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