USB2228-NU-09 Standard Microsystems (SMSC), USB2228-NU-09 Datasheet - Page 18

• Manufacturer Part Number: USB2228-NU-09
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2228-NU-09

• Lead Free Status / RoHS Status: Compliant

4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs
Datasheet
SMSC USB2227/USB2228
5.2
GPIO[15:12]
nTEST[1:0]
SYMBOL
nRESET
VDD18
VDD33
VSS
BUFFER
IPU
IPD
IS
I
Notes:
Buffer Type Descriptions
Hot-insertion capable card connectors are required for all flash media. 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 8051 is in standby mode.
VDD18 (Pin 106) and VDD18PLL (Pin 101) must have a 10uF +/-20% Low-ESR (equivalent series
resistance) <0.1 ohm bypass capacitor to VSSA. These capacitors must be as close to these pins
as possible.
128-PIN
VTQFP
115
106
100
108
112
90
91
92
93
95
96
49
43
80
15
16
47
84
85
97
3
Input
Input with internal weak pull-up resistor.
Input with internal weak pull-down resistor.
Input with Schmitt trigger
Table 5.1 USB2227/USB2228 Buffer Type Descriptions
DIGITAL POWER, GROUNDS, and NO CONNECTS
BUFFER
TYPE
I/O8
IS
I
DATASHEET
General Purpose I/O:
These pins may be used either as input, or output.
RESET input:
This active low signal is used by the system to reset the chip.
The active low pulse should be at least 1μs wide.
TEST input:
These signals are used for testing the chip. User should
normally tie them high externally, if the test function is not used.
1.8v Digital Core Power:
+1.8V Core power
All VDD18 pins must be connected together on the circuit board.
3.3v Power & Voltage Regulator Input:
3.3V Power & Regulator Input.
pins 100 & 108 supply 3.3V power to the internal 1.8V
regulators.
Ground:
Ground Reference
18
DESCRIPTION
DESCRIPTION
Revision 1.93 (11-01-07)