SMSC USB3250 PRODUCT5 PREVIEW, Pin Description Tables, NAME, LEVEL, Reset, ACTIVE, Suspend, DIRECTION, Line State, DESCRIPTION, System Clock, Databus Select

Hi-Speed USB Device Transceiver with UTMI Interface

Pin Description Tables

Table 1 System Interface Pins

		ACTIVE
NAME	DIRECTION	LEVEL			DESCRIPTION
RESET	Input	High	Reset. Reset all state machines. After coming out of reset, must
			wait 5 rising edges of clock before asserting TXValid for transmit.
			Assertion of Reset: May be asynchronous to CLKOUT.
			De-assertion of Reset: Must be synchronous to CLKOUT unless
			RESET is asserted longer than two periods of CLKOUT.
XCVRSELECT	Input	N/A	Transceiver Select. This signal selects between the FS and HS
			transceivers:
			0: HS transceiver enabled
			1: FS transceiver enabled.
TERMSELECT	Input	N/A	Termination Select. This signal selects between the FS and HS
			terminations:
			0: HS termination enabled
			1: FS termination enabled
SUSPENDN	Input	Low	Suspend. Places the transceiver in a mode that draws minimal
			power from supplies. Shuts down all blocks not necessary for
			Suspend/Resume operation. While suspended, TERMSELECT
			must always be in FS mode to ensure that the 1.5k Ω pull-up on
			DP remains powered.
			0: Transceiver circuitry drawing suspend current
			1: Transceiver circuitry drawing normal current
CLKOUT	Output	Rising Edge	System Clock. This output is used for clocking receive and
			transmit parallel data at 60MHz (8-bit mode) or 30MHz (16-bit
			mode). When in 8-bit mode, this specification refers to CLKOUT
			as CLK60. When in 16-bit mode, CLKOUT is referred to as
			CLK30.
OPMODE[1:0]	Input	N/A	Operational Mode. These signals select between the various
			operational modes:
			[1]	[0]	Description
			0	0	0: Normal Operation
			0	1	1: Non-driving (all terminations removed)
			1	0	2: Disable bit stuffing and NRZI encoding
			1	1	3: Reserved
LINESTATE[1:0]	Output	N/A	Line State.		These signals reflect the current state of the USB
			data bus in FS mode, with [0] reflecting the state of DP and [1]
			reflecting the state of DM. When the device is suspended or
			resuming from a suspended state, the signals are combinatorial.
			Otherwise, the signals are synchronized to CLKOUT.
			[1]	[0]	Description
			0	0	0: SE0
			0	1	1: J State
			1	0	2: K State
			1	1	3: SE1
DATABUS16_8	Input	N/A	Databus Select. Selects between 8-bit and 16-bit data transfers.
			0: 8-bit data path enabled. VALIDH is undefined. CLKOUT =
			60MHz.
			1: 16-bit data path enabled. CLKOUT = 30MHz.

SMSC USB3250 PRODUCT5 PREVIEW Revision 1.7 (05-11-07)