C8051F340-GQR Silicon Laboratories Inc, C8051F340-GQR Datasheet - Page 104

• Manufacturer Part Number: C8051F340-GQR
• Description: MCU 8-Bit C8051F34x 8051 CISC 64KB Flash 3.3V/5V 48-Pin TQFP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F340-GQR

• Package: 48TQFP
• Device Core: 8051
• Family Name: C8051F34x
• Maximum Speed: 48 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 40
• Interface Type: I2C/SMBus/SPI/UART/USB
• On-chip Adc: 17-chx10-bit
• Number Of Timers: 4
• Ram Size: 4.25 KB
• Program Memory Size: 64 KB
• Program Memory Type: Flash
• Operating Temperature: -40 to 85 °C

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:
The USBRSF bit will read ‘1’ following a USB reset. The state of the RST pin is unaffected by this reset.
104
1. RESET signaling is detected on the USB network. The USB Function Controller (USB0) must
2. The voltage on the VBUS pin matches the polarity selected by the VBPOL bit in register
be enabled for RESET signaling to be detected. See
troller (USB0)” on page 159
REG0CN. See
detection circuit.
Section “8. Voltage Regulator (REG0)” on page 69
for information on the USB Function Controller.
Rev. 1.3
Section “16. Universal Serial Bus Con-
for details on the VBUS