USB5534B Datasheet, PDF (9/73 Pages) Microchip Technology – 4-Port SS/HS USB Hub Controller

USB5534B
TABLE 3-1: USB5534B PIN DESCRIPTIONS (CONTINUED)
Symbol
Buffer Type
Description
USB PORT CONTROL
PRT_PWR[4:1]/
PRT_CTL[4:1]
O12 USB Power Enable
Enables power to USB peripheral devices downstream.
VBUS
Note: This pin also provides configuration strap functions.
See Note 3-1.
I
Upstream VBUS Power Detect
This pin can be used to detect the state of the upstream bus power. The
device monitors this pin to determine when to assert the internal D+ pull-
up resistor (signaling a connect event).
SPI_CE_N
SPI_CLK
SPI_DO
SPI_DI
When designing a detachable hub, this pin should be connected to
VBUS on the upstream port via a 2:1 voltage divider. Two 100 k
resistors are suggested.
For self-powered applications with a permanently attached host, this pin
must be connected to a dedicated host control output, or connected to
the 3.3 V domain that powers the host (typically VDD33).
SPI INTERFACE (4 PINS)
O12 SPI Enable
O12 SPI Clock
SPI Serial Data Out
O12
The output for the SPI port.
Note: This pin also provides configuration strap functions.
See .
I
SPI Serial Data In
The SPI data in to the controller from the ROM. This pin has a weak
internal pull-down applied at all times to prevent floating.
TRST
DYNCPDIS_N
JTAG/OCS INTERFACE
JTAG Asynchronous Reset
Note:
If using the SMBus interface, a pull-up on this signal will enable
Legacy Mode, while leaving it unconnected or pulled-down will
enable Advanced Mode.
IPU
(Note 3-4)
Note: Only available in test mode.
Dynamic Charging Port Disable
This active-low signal is used to globally disable Battery Charging
support on all USB downstream ports configured as Charging Ports.
UCS_SMBALERT_N
Note: This signal available in -6080 versions only
UCS1002 SMBus Alert
When charging port is enabled and SMBus devices are used, this signal
acts as an active-low SMBus alert.
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DS00001681C-page 9