PIC32MX1XX_12 Datasheet, PDF (120/328 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
FIGURE 10-1:
PIC32MX1XX/2XX FAMILY USB INTERFACE DIAGRAM
OSC1
OSC2
Bus
D+⁽¹⁾
D-⁽¹⁾
ID⁽¹⁾
VBUSON⁽¹⁾
VUSB3V3
Primary Oscillator
(POSC)
FRC
Oscillator
8 MHz Typical
UFIN⁽⁴⁾
Div x
PLL
UPLLIDIV⁽⁵⁾
TUN<5:0>⁽³⁾
Div 2
UPLLEN⁽⁵⁾
UFRCEN⁽²⁾
SRP Charge
SRP Discharge
Full Speed Pull-up
Host Pull-down
Low Speed Pull-up
Transceiver
USB Module
USB
Voltage
Comparators
48 MHz USB Clock⁽⁶⁾
Registers
and
Control
Interface
SIE
Host Pull-down
ID Pull-up
DMA
System
RAM
Transceiver Power 3.3V
Note 1:
2:
3:
4:
5:
6:
Pins can be used as digital input/output when USB is not enabled.
This bit field is contained in the OSCCON register.
This bit field is contained in the OSCTRM register.
USB PLL UFIN requirements: 4 MHz.
This bit field is contained in the DEVCFG2 register.
A 48 MHz clock is required for proper USB operation.
DS61168E-page 120
Preliminary
 2011-2012 Microchip Technology Inc.