Datasheet

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