USB97C223-NU SMSC [SMSC Corporation], USB97C223-NU Datasheet - Page 15

• Manufacturer Part Number: USB97C223-NU
• Description: Bus Powered USB 2.0 Flash Media Controller
• Manufacturer: SMSC [SMSC Corporation]

Bus Powered USB 2.0 Flash Media Controller
Datasheet
Note 1:
Note 2:
SMSC USB97C223
General
Purpose I/O
General
Purpose I/O
General
Purpose I/O
RESET input
TEST Input
1.8v Digital
Core Power
3.3v Digital I/O
power
VDDCORE
reference
ground
VDDIO
reference
ground
NAME
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.
nMCE is normally asserted except when the system is in standby mode.
nTEST[0:1]
GPIO[15:8]
VDDCORE
VSSCORE
SYMBOL
nRESET
VDDIO
GPIO5
GPIO7
VSSIO
DIGITAL POWER, GROUNDS, and NO CONNECTS
BUFFER
TYPE
I/O8
I/O8
I/O8
IPU
IS
DATASHEET
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin’s function while operating from internal ROM is
shown in Section 6.3 , GPIO Usage.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin’s function while operating from internal ROM is
shown in Section 6.3 , GPIO Usage.
These pins may be used either as input, or output.
These pins’ functions while operating from internal ROM
are shown in Section 6.3 , GPIO Usage.
This active low signal is used by the system to reset the
chip. The active low pulse should be at least 1µs wide.
These signals are used for testing the chip. User should
normally tie them high externally.
+1.8V Core power
All VDDCORE pins must be connected together on the
circuit board.
If the internal 1.8V regulator is enabled, 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
Page 15
DESCRIPTION
Revision 1.5 (01-06-05)