USB2224 Datasheet, PDF (15/20 Pages) SMSC Corporation – BUS POWERED USB2.0 FLASH MEDIA CONTROLLER

Bus Powered USB2.0 Flash Media Controller
Datasheet
6.2
Buffer Type Descriptions
BUFFER
I
IPU
IPD
IS
I/O8
I/OD8
O8
I/O8PU
I/O8PD
ICLKx
OCLKx
I/O-U
O-U
I-U
OIA
Table 6.2 - USB2224 Buffer Type Descriptions
DESCRIPTION
Input
Input with controlled internal weak pull-up resistor.
Input with controlled internal weak pull-down resistor.
Input with Schmitt trigger
Input/Output with 8mA drive
Input/Open drain output … 8mA sink
Output with 8mA drive
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
Analog Input
Special analog Input/Output
6.3 GPIO Usage Table
NAME
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
GPIO9
GPIO10
GPIO11
ACTIVE
LEVEL
H/L
H
H
H/L
L
H
H
L
L
L
L
Table 6.3 - GPIO Usage
SYMBOL
ACT/DOOR
EE_CS
V_BUS
EE_DIN/EE_DOUT/xDID
SD_CD
A16 ( external ROM only )
/ROMEN
EE_CLK
MS Power Control
CF Power Control
SM Power Control
SD Power Control
DESCRIPTION AND NOTE
Media Activity LED / xD Door SW
Input
Serial EE PROM chip select
USB V bus detect
Serial EE PROM input/output and
xD ID pin input
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.
Int/Ext ROM select. External
program memory A16 address line
connect for DFU.
Serial EE PROM clock output
Memory Stick Card Power Control
CompactFlash Card Power Control
SmartMedia Card Power Control
SD/MMC Card Power Control
SMSC USB2224
Page 15
DATASHEET
Revision 1.3 (09-21-04)