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Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
Datasheet
Revision 1.1 (05-29-08) 18 SMSC USB2250/50i/51/51i
DATASHEET
General Purpose
I/O
GPIO4
(SCL/xD_ID)
118 I/O12 GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
O12 SCL: This is the clock output when used with
an external EEPROM.
I/O12 xD_ID: This is the xD card detection pin only
applicable to the USB2250/USB2250i.
General Purpose
I/O
GPIO5
(SDA)
5 I/O12 This pin may be used either as input, edge
sensitive interrupt input, or output.
SDA: This is the data pin when used with an
external serial EEPROM.
General Purpose
I/O
GPIO8 /
CRD_PWR0
14 I/O12 GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
I/O200 CRD_PWR: Card Power drive of 3.3V @
either 100mA or 200mA.
General Purpose
I/O
GPIO9 /
CRD_PWR1
78 I/O12 GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
I/O200 CRD_PWR: Card Power drive of 3.3V @
either 100mA or 200mA.
General Purpose
I/O
GPIO10 /
CRD_PWR2
76 I/O12 GPIO: These pins may be used either as
input, edge sensitive interrupt input, or
output. It is a requirement that this is the
only FET used to power SM devices. Failure
to do this will violate SM voltage specification
on SM device pins.
I/O200 CRD_PWR: Card Power drive of 3.3V @
either 100mA or 200mA.
General Purpose
I/O
GPIO11 /
CRD_PWR3
16 I/O12 GPIO: These pins may be used either as
input, edge sensitive interrupt input, or
output.
I/O200 CRD_PWR: Card Power drive of 3.3V @
either 100mA or 200mA.
RESET Input nRESET 64 IS This active low signal is used by the system
to reset the chip. The active low pulse should
be at least 1μs wide.
TEST Input TEST 103 I This signal is used for testing the chip. User
should normally tie this pin low externally, if
the test function is not used.
Regulator
Enable
REG_EN 6 IPU This signal is used to enable the internal
1.8V regulator.
Table 5.1 USB2250/50i/51/51i 128-Pin VTQFP Pin Descriptions (continued)
NAME SYMBOL
128-PIN
VTQFP
BUFFER
TYPE DESCRIPTION