USB2244-AEZG-05 SMSC, USB2244-AEZG-05 Datasheet - Page 19

• 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

Ultra Fast USB 2.0 Multi-Format, SD/MMC, and MS Flash Media Controllers
Datasheet
Chapter 6 Pin Descriptions
SMSC USB224x
6.1
xD_D[7:0]
xD_nWP
xD_ALE
xD_CLE
SYMBOL
This section provides a detailed description of each signal. The signals are arranged in functional
groups according to their associated interface. The pin descriptions are applied when using the internal
default firmware and can be referenced in
reference
The “n” symbol in the signal name indicates that the active, or asserted, state occurs when the signal
is at a low voltage level. When “n” is not present in the signal name, the signal is asserted at the high
voltage level.
The terms assertion and negation are used exclusively. This is done to avoid confusion when working
with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a
signal is active, independent of whether that level is represented by a high or low voltage. The term
negate, or negation, indicates that a signal is inactive.
USB224x 36-Pin QFN Pin Descriptions
xD-PICTURE CARD (xD) INTERFACE (APPLIES ONLY TO USB2240/USB2240i)
20
23
25
30
10
11
4
5
7
8
9
Chapter 2, "Acronyms," on page 7
Table 6.1 USB224x 36-PiN QFN Pin Descriptions
I/O12PD
O12PD
O12PD
O12PD
BUFFER
TYPE
DATASHEET
19
for a list of the acronyms used.
Chapter 7, "Pin Configurations," on page
xD Data
These bi-directional data signals have weak internal
pull-down resistors.
xD Write Protect
This pin is an active low write protect signal for the xD
device and has a weak pull-down resistor that is
permanently enabled.
xD Address Strobe
This pin is an active high Address Latch Enable signal
for the xD device and has a weak pull-down resistor
that is permanently enabled.
xD Command Strobe
This pin is an active high Command Latch Enable
signal for the xD device and has a weak pull-down
resistor that is permanently enabled.
DESCRIPTION
Revision 2.0 (10-14-09)
25. Please