Appendix A: Revision History .............................................................................................................................................................. 52
Product Identification System ............................................................................................................................................................. 53
The Microchip Web Site ...................................................................................................................................................................... 54
Customer Change Notification Service ............................................................................................................................................... 54
Customer Support ............................................................................................................................................................................... 54
2018-2019 Microchip Technology Inc.
DS00002674C-page 3
USB7052
1.0
1.1
PREFACE
General Terms
GENERAL TERMS
Description
Analog-to-Digital Converter
8 bits
Communication Device Class
Control and Status Registers
Downstream Facing Port
32 bits
End of Packet
Endpoint
First In First Out buffer
Full-Speed
Finite State Machine
General Purpose I/O
Hi-Speed
High Speed Over Sampling
The Hub Feature Controller, sometimes called a Hub Controller for short is the internal
processor used to enable the unique features of the USB Controller Hub. This is not to
be confused with the USB Hub Controller that is used to communicate the hub status
back to the Host during a USB session.
Inter-Integrated Circuit
Low-Speed
Least Significant Bit
Least Significant Byte
Most Significant Bit
Most Significant Byte
Not Applicable
No Connect
One Time Programmable
Printed Circuit Board
Physical Coding Sublayer
Power Delivery
Physical Layer
Phase Lock Loop
Refers to a reserved bit field or address. Unless otherwise noted, reserved bits must
always be zero for write operations. Unless otherwise noted, values are not guaran-
teed when reading reserved bits. Unless otherwise noted, do not read or write to
reserved addresses.
Software Development Kit
System Management Bus
Upstream Facing Port
Universally Unique IDentifier
16 bits
TABLE 1-1:
Term
ADC
Byte
CDC
CSR
DFP
DWORD
EOP
EP
FIFO
FS
FSM
GPIO
HS
HSOS
Hub Feature Controller
I
2
C
LS
lsb
LSB
msb
MSB
N/A
NC
OTP
PCB
PCS
PD
PHY
PLL
RESERVED
SDK
SMBus
UFP
UUID
WORD
DS00002674C-page 4
2018-2019 Microchip Technology Inc.
USB7052
1.2
Buffer Types
BUFFER TYPES
Description
Input.
Input with Schmitt trigger.
Output buffer with 12 mA sink and 12 mA source.
Open-drain output with 12 mA sink
50
μA
(typical) internal pull-up. Unless otherwise noted in the pin description, internal pull-
ups are always enabled.
Internal pull-up resistors prevent unconnected inputs from floating. Do not rely on internal
resistors to drive signals external to the device. When connected to a load that must be
pulled high, an external resistor must be added.
PD
50
μA
(typical) internal pull-down. Unless otherwise noted in the pin description, internal
pull-downs are always enabled.
Internal pull-down resistors prevent unconnected inputs from floating. Do not rely on
internal resistors to drive signals external to the device. When connected to a load that
must be pulled low, an external resistor must be added.
ICLK
OCLK
I/O-U
I-R
A
P
Crystal oscillator input pin
Crystal oscillator output pin
Analog input/output defined in USB specification.
RBIAS.
Analog.
Power pin.
TABLE 1-2:
Buffer Type
I
IS
O12
OD12
PU
1.3
1.
2.
3.
4.
5.
Reference Documents
Universal Serial Bus Revision 3.1 Specification,
http://www.usb.org
Battery Charging Specification,
Revision 1.2, Dec. 07, 2010, http://www.usb.org
I
2
C-Bus Specification,
Version 1.1, http://www.nxp.com/documents/user_manual/UM10204.pdf
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