USB2223-03 Datasheet, PDF (14/20 Pages) SMSC Corporation – BUS POWERED USB 2.0 FLASH MEDIA CONTROLLER

Bus Powered USB2.0 Flash Media Controller
Datasheet
NAME
General
Purpose I/O
SYMBOL
GPIO4
BUFFER
TYPE
I/O8
DESCRIPTION
This pin may be used either as input, edge sensitive
interrupt input, or output.
General
Purpose I/O
GPIO5
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General
Purpose I/O
GPIO7
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General
Purpose I/O
RESET input
TEST Input
1.8v Digital
Core Power
GPIO[15:8]
This pin’s function while operating from internal ROM is
shown in Table 6.3 - GPIO Usage.
I/O8
These pins may be used either as input, or output.
These pins’ functions while operating from internal ROM
are shown in Table 6.3 - GPIO Usage.
nRESET
IS
This active low signal is used by the system to reset the
chip. The active low pulse should be at least 1µs wide.
nTEST[0:1]
I
These signals are used for testing the chip. User should
normally tie them high externally.
DIGITAL POWER, GROUNDS, and NO CONNECTS
VDDCORE
+1.8V Core power
All VDDCORE pins must be connected together on the
circuit board.
3.3v Digital I/O
power
VDDCORE
reference
ground
VDDIO
reference
ground
VDDIO
VSSCORE
VSSIO
Pin 91 MUST have a 10uf +/- 20%, (equivalent series
resistance (ESR) <0.1ohm) bypass capacitor to VSSA,
and this capacitor should be placed as close to the pin as
possible.
+3.3V I/O power
VDDCORE ground Reference
VDDIO ground reference
Note 1: Hot-insertion capable card connectors are required for all of flash medias. It is required for SD connector to
have Write Protect switch. This allows the chip to detect MMC card.
Note 2: nMCE is normally asserted except when the system is in standby mode.
Revision 1.2 (09-21-04)
Page 14
DATASHEET
SMSC USB2223-03