SMSC USB2250i User Manual
Page 18
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 1
μs 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