Bus Powered USB2.0 Flash Media Controller
Datasheet
6.2
Buffer Type Descriptions
Table 6.2 - USB2224 Buffer Type Descriptions
BUFFER
I
DESCRIPTION
Input
IPU
IPD
IS
Input with controlled internal weak pull-up resistor.
Input with controlled internal weak pull-down resistor.
Input with Schmitt trigger
I/O8
Input/Output with 8mA drive
I/OD8
O8
Input/Open drain output … 8mA sink
Output with 8mA drive
I/O8PU
I/O8PD
ICLKx
OCLKx
I/O-U
O-U
Input/Output with 8mA drive controlled weak pull-up resistor
Input/Output with 8mA drive controlled weak pull-down resistor
XTAL clock input
XTAL clock output
Analog Input/Output Defined in USB specification
Analog Output
I-U
Analog Input
OIA
Special analog Input/Output
6.3
GPIO Usage Table
Table 6.3 - GPIO Usage
SYMBOL
ACTIVE
NAME
DESCRIPTION AND NOTE
LEVEL
GPIO1
H/L
ACT/DOOR
Media Activity LED / xD Door SW
Input
GPIO2
GPIO3
GPIO4
H
H
H/L
EE_CS
V_BUS
EE_DIN/EE_DOUT/xDID
Serial EE PROM chip select
USB V bus detect
Serial EE PROM input/output and
xD ID pin input
GPIO5
L
SD_CD
SD Card Detect SW Input. In
production ROM versions, this pin
must always be pulled high except
to indicate SD card insertion. If no
SD interface is used, this pin must
still be pulled high for proper
operation.
GPIO6
H
A16 ( external ROM only )
/ROMEN
Int/Ext ROM select. External
program memory A16 address line
connect for DFU.
GPIO7
GPIO8
GPIO9
GPIO10
GPIO11
H
L
L
L
L
EE_CLK
Serial EE PROM clock output
Memory Stick Card Power Control
CompactFlash Card Power Control
SmartMedia Card Power Control
SD/MMC Card Power Control
MS Power Control
CF Power Control
SM Power Control
SD Power Control
SMSC USB2224
Page 15
Revision 1.3 (09-21-04)
DATASHEET
SMSC [ SMSC CORPORATION ]
