SMSC USB2512i EMB, TYPE, QFN-36, BUFFER, SYMBOL, CFG_SEL1, CFG_SEL0, DESCRIPTION, SMBUS OR EEPROM INTERFACE BEHAVIOR, Table 3.2 SMBus or EEPROM Interface Behavior

				Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller
				Datasheet
		Table 3.1 USB2512i Pin Descriptions (continued)
		QFN-36	BUFFER
SYMBOL		EMB	TYPE	DESCRIPTION
XTAL2		32	OCLKx	Crystal Output
				24MHz Crystal
				This is the other terminal of the crystal, or a NO-CONNECT
				when an external clock source is used to drive XTAL1/CLKIN.
				This output must not be used to drive any external circuitry
				other than the crystal circuit.
RESET_N		26	IS	RESET Input
				The system can reset the chip by driving this input low. The
				minimum active low pulse is 1 us.
				When the RESET_N pin is pulled to VDD33, the internal POR
				(Power on Reset) is enabled and no external reset circuitry is
				required. The internal POR holds the internal logic in reset until
				the power supplies are stable.
SUSP_IND/		28	I/O	Active/Suspend status LED or Local-Power & Non Removable
LOCAL_PWR/				Strap Option
NON_REM0				Suspend Indicator: Indicates USB state of the hub.
				‘negated’ = Unconfigured, or configured and in USB Suspend
				‘asserted’ = Hub is configured, and is active (i.e., not in
				suspend)
				Local Power: Detects availability of local self-power source.
				Low = Self/local power source is NOT available (i.e., Hub gets
				all power from Upstream USB VBus).
				High = Self/local power source is available.
				NON_REM0 Strap Option:
				If this strap is enabled by package and configuration settings
				(see Table 3.2), this pin will be sampled (in conjunction with
				NON_REM1) at RESET_N negation to determine if ports [2:1]
				contain permanently attached (non-removable) devices. Also,
				the active state of the LED
				will be determined as follows:
				NON_REM[1:0] = ‘00’, All ports are removable, and the LED is
				active high
				NON_REM[1:0] = ‘01’, Port 1 is nonremovable, and the LED is
				active low
				NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable, and the
				LED is active high
				NON_REM[1:0] = ‘11’, Ports 1 & 2 are non-removable, and the
				LED is active low
TEST		11	IPD	TEST pin
				Used for testing the chip. User must treat as a no-connect or
				connect to ground.
		Table 3.2 SMBus or EEPROM Interface Behavior
CFG_SEL1	CFG_SEL0			SMBUS OR EEPROM INTERFACE BEHAVIOR
0	0		Internal Default Configuration
			„ Strap Options Enabled

Revision 1.92 (11-28-07)	10	SMSC USB2512i
	DATASHEET