USB2251-NU-05 Standard Microsystems (SMSC), USB2251-NU-05 Datasheet - Page 18

• Manufacturer Part Number: USB2251-NU-05
• Description: ULTRA FAST USB 2.0 MULTI-SLOT FLASH MEDI
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2251-NU-05

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Revision 2.0 (09-29-09)
Memory Chip
Enable
General Purpose
Input/Output
NAME
Table 6.1 USB2250/50i/51/51i 128-Pin VTQFP Pin Descriptions (continued)
(VBUS_DET)
CRD_PWR0
CRD_PWR1
SYMBOL
GPIO8 /
GPIO9 /
xD_ID)
GPIO1
GPIO3
GPIO4
GPIO5
(SCL /
nMCE
(SDA)
LED /
128-PIN
VTQFP
120
121
118
26
14
78
5
DATASHEET
MISC
BUFFER
I/O200
I/O200
18
TYPE
I/O12
I/O12
I/O12
I/O12
I/O12
I/O12
I/O12
O12
O12
This pin is the active low program Memory
Chip Enable strobe signal.
This signal is asserted when any external
access is being done by the processor.
This signal is held to the logic 'high' while
RESET_N is asserted.
LED: GPIO1 can be used as an LED output.
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
Custom firmware is required to activate this
function.
This pin may be used either as input, edge
sensitive interrupt input, or output. Custom
firmware is required to activate this function.
VBUS is a 3.3 volt input. A resistor divider
must be used if connecting to 5 volts of USB
power.
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or utput.Custom
firmware is required to activate this function.
SCL: This is the clock output when used with
an external EEPROM.
xD_ID: This is the xD-Picture Card detection
pin only applicable to USB2250/USB2250i.
This pin may be used either as input, edge
sensitive interrupt input, or output. Custom
firmware is required to activate this function.
SDA: This is the data pin when used with an
external serial EEPROM.
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
Custom firmware is required to activate this
function.
CRD_PWR: Card power drive of 3.3 V at
either 100 mA or 200 mA.
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
Custom firmware is required to activate this
function.
CRD_PWR: Card power drive of 3.3 V at
either 100 mA or 200 mA.
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
DESCRIPTION
SMSC USB2250/50i/51/51i
Datasheet