Ultra Fast USB 2.0 Multi-Format Flash Media Controller
Datasheet
Table 5.1 USB2240/USB2241 36-Pin QFN Pin Descriptions (continued)
36-PIN
QFN
BUFFER
TYPE
NAME
SYMBOL
DESCRIPTION
General
Purpose I/O
GPIO2 /
RXD /
SDA
27
I/O12
I
GPIO: This pin may be used either as input, edge
sensitive interrupt input, or output.
RXD: In addition to the above, the signal can be
used as input to the RXD of UART in the device,
when the TXD_RXD_SEL bit in UTIL_CONFIG1
register is cleared to "0".
I/O12
I/O12
SDA: This is the data pin when used with an
external serial EEPROM.
General
GPIO4
29
31
This pin may be used either as input, edge sensitive
interrupt input, or output.
Purpose I/O
For the USB2240 only, this pin can be used as the
xD card detection pin.
General
Purpose I/O
GPIO7 /
TXD /
I/O12
O12
GPIO: This pin may be used either as input, edge
sensitive interrupt input, or output.
SCK /
MS_SKT_SEL
TXD: In addition, as an output, the GPIO7 can be
used as an output TXD of UART in the device, when
the GPIO2/TXD bit in UTL_CONFIG register is set
to "1"
O12
I
SCK: This is the clock output when used with an
external EEPROM.
MS_SKT_SEL: On the positive edge of nRESET,
this pin is sampled to determined the Memory Stick
socket size.
1 = 8 bit
0 = 4 bit
General
Purpose I/O
GPIO10
(CRD_PWR)
21
I/O200
GPIO: This pin may be used either as input, edge
sensitive interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ either
100mA or 200mA.
RESET Input
TEST Input
nRESET
TEST
18
28
IS
I
This active low signal is used by the system to reset
the chip. The active low pulse should be at least 1μs
wide.
This signal is used for testing the chip. User should
normally tie this pin low externally, if the test function
is not used.
DIGITAL / ANALOG / POWER
+1.8V Core
power
VDD18
13
All VDD18 pins must be connected together on the
circuit board.
+1.8V core power. This pin must have a 1.0μF (or
greater) ±20% (ESR <0.1Ω) capacitor to VSS.
3.3V Power &
Regulator
Input.
VDD33
6
14
22
3.3V Power & Regulator Input.
3.3V Analog
Power
VDDA33
36
3.3V Analog Power
Revision 2.6 (05-08-08)
SMSC USB2240/USB2241
DATA1S6HEET
SMSC [ SMSC CORPORATION ]
