Microchip Technology TDGL019 Data Sheet
PIC32MX1XX/2XX
DS60001168F-page 122
© 2011-2014 Microchip Technology Inc.
FIGURE 10-1:
PIC32MX1XX/2XX FAMILY USB INTERFACE DIAGRAM
OSC1
OSC2
Primary Oscillator
8 MHz Typical
FRC
Oscillator
TUN<5:0>
(3)
PLL
48 MHz USB Clock
(6)
Div x
UPLLEN
(5)
UFRCEN
(2)
(P
OSC
)
UPLLIDIV
(5)
UF
IN(4)
Div 2
V
USB3V3
D+
(1)
D-
(1)
ID
(1)
Bus
Transceiver
SIE
V
BUSON(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
F
IN
requirements: 4 MHz.
5:
This bit field is contained in the DEVCFG2 register.
6:
A 48 MHz clock is required for proper USB operation.