USB2412-DZK Standard Microsystems (SMSC), USB2412-DZK Datasheet - Page 11

• Manufacturer Part Number: USB2412-DZK
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2412-DZK

• Lead Free Status / RoHS Status: Supplier Unconfirmed

2-Port USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB2412
PIN
13
19
16
24
#
NON_REM[1]
NON_REM[0]
SUSP_IND /
SYMBOL
HS_IND
XTALIN
CLKIN
BUFFER
Table 3.2 USB2412 Pin Descriptions (continued)
ICLKx
TYPE
I/O12
I/O
I/O
Non-removable Port Strap Option
This pin will be sampled (in conjunction with SUSP_IND /
NON_REM[0]) at RESET_N negation to determine if ports [2:1]
contain permanently attached (non-removable) devices:
NON_REM[1:0] = ‘00’, all ports are removable.
NON_REM[1:0] = ‘01’, port 1 is non-removable.
NON_REM[1:0] = ‘1x, ports 1 and 2 are non-removable.
Please see
complete description.
Active/Suspend Status LED
Suspend Indicator: Indicates USB hub state. Please see
"LED Strap Option"
NON_REM[0] = ‘0’, SUSP_IND is active high.
NON_REM[0] = ‘1’, SUSP_IND is active low.
‘negated’ = Unconfigured, or configured and in USB Suspend
‘asserted’ = The hub is configured and is active (i.e., not in suspend)
Non-removable Port Strap Option
This pin will be sampled (in conjunction with NON_REM[1]) at
RESET_N negation to determine if ports [2:1] contain permanently
attached (non-removable) devices:
NON_REM[1:0] = ‘00’, all ports are removable.
NON_REM[1:0] = ‘01’, port 1 is non-removable.
NON_REM[1:0] = ‘1x’, ports 1 and 2 are non-removable.
Please see
complete description.
Hi-Speed Upstream Port Indicator
HS_IND: Hi-speed Indicator for upstream port connection speed.
Note:
‘Asserted’ = the hub is connected at HS
‘Negated’ = the hub is connected at FS
24 MHz Crystal Input
This pin connects to either one terminal of the crystal or to an external
24 MHz clock when a crystal is not used.
External Clock Input
This pin connects to either one terminal of the crystal or to an external
24 MHz clock when a crystal is not used.
DATASHEET
An LED can be attached for visual indication. Please see
Section 3.6, "LED Strap Option"
When an LED is not used, this pin requires a 50 kΩ or higher
resistor to ground.
MISC
Section 3.5, "Non-Removable Strap Option"
Section 3.5, "Non-Removable Strap Option"
11
for a complete description.
DESCRIPTION
for a complete description.
Revision 1.0 (02-12-10)
for a
Section 3.6,
for a