USB2244-AEZG-05 SMSC, USB2244-AEZG-05 Datasheet - Page 20

• Manufacturer Part Number: USB2244-AEZG-05
• Description: USB Interface IC Ultra Fast USB 2.0 Flash Media CTRL
• Manufacturer: SMSC

Specifications of USB2244-AEZG-05

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 2.0 (10-14-09)
xD_nRE
xD_nWE
xD_nB/R
GPIO14
(xD_nCD)
xD_nCE
SYMBOL
16
12
17
19
15
Table 6.1 USB224x 36-PiN QFN Pin Descriptions (continued)
O12PU
O12PU
IPU
I/O12
O12PU
BUFFER
Ultra Fast USB 2.0 Multi-Format, SD/MMC, and MS Flash Media Controllers
TYPE
DATASHEET
20
xD Read Enable
This pin is an active low read strobe signal for the xD
device.
When using the internal FET, this pin has a weak
internal pull-up resistor that is tied to the output of the
internal power FET.
If an external FET is used (Internal FET is disabled),
then the internal pull-up is not available (external pull-
ups must be used).
xD Write Enable
This pin is an active low write strobe signal for the xD
device.
When using the internal FET, this pin has a weak
internal pull-up resistor that is tied to the output of the
internal power FET.
If an external FET is used (Internal FET is disabled),
then the internal pull-up is not available (external pull-
ups must be used).
xD Busy or Data Ready
This pin is connected to the BSY/RDY pin of the xD
device.
When using the internal FET, this pin has a weak
internal pull-up resistor that is tied to the output of the
internal power FET.
If an external FET is used (Internal FET is disabled),
then the internal pull-up is not available (external pull-
ups must be used).
xD Card Detection GPIO
This is a GPIO designated by the default firmware as
the xD-Picture card detection pin.
xD Chip Enable
This pin is the active low chip enable signal to the xD
device.
When using the internal FET, this pin has a weak
internal pull-up resistor that is tied to the output of the
internal power FET.
If an external FET is used (Internal FET is disabled),
then the internal pull-up is not available (external pull-
ups must be used).
DESCRIPTION
SMSC USB224x
Datasheet