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USB2227-NU-09

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
2007-2016 Microchip Technology Inc. DS00002256A-page 13
USB2227/USB2228
GPIO5 110 I/O8 General Purpose I/O:
This pin may be used either as input, edge sensitive interrupt
input, or output.
GPIO6/
ROMEN
109 IPU GPIO6, ROMEN:
This pin has an internal weak pull-up resistor that is enabled or
disabled by the state of nRESET.
The pull-up is enabled when nRESET is active.
The pull-up is disabled, when the nRESET is inactive (some clock
cycles later, after the rising edge of nRESET).
The state of this pin is latched internally on the rising edge of
nRESET to determine if internal or external program memory is
used.
The state latched is stored in ROMEN bit of GPIO_IN1 register.
I/O8 After the rising edge of nRESET, this pin may be used as GPIO6
or RXD.
When pulled low via an external weak pull-down resistor, an
external program memory should be connected to the memory
data bus. The USB2227/USB2228 uses this external bus for
program execution.
When this pin is left unconnected or pulled high by a weak pull-
up resistor, the USB2227/USB2228 uses the internal ROM for
program execution.
GPIO7 107 I/O8 General Purpose I/O:
This pin may be used either as input, edge sensitive interrupt
input, or output.
GPIO8/
CRD_PWR0
42 I/O8 General Purpose I/O or Card Power:
GPIO: This pin may be used either as input, edge sensitive
interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ 100mA.
GPIO9 105 I/O8 General Purpose I/O:
This pin may be used either as input, edge sensitive interrupt
input, or output.
GPIO10/
CRD_PWR1
79 I/O8 General Purpose I/O or Card Power:
GPIO: These pins may be used either as input, edge sensitive
interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ 100mA.
GPIO11/
CRD_PWR2
44 I/O8 General Purpose I/O or Card Power:
GPIO: This pin may be used either as input, edge sensitive
interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ 200mA.
GPIO[15:12] 90
91
92
93
I/O8 General Purpose I/O:
These pins may be used either as input, or output.
nRESET 115 IS RESET input:
This active low signal is used by the system to reset the chip. The
active low pulse should be at least 1s wide.
Symbol
128-Pin
VTQFP
Buffer Type Description
USB2227/USB2228
DS00002256A-page 14 2007-2016 Microchip Technology Inc.
Note 1: 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.
2: nMCE is normally asserted except when the 8051 is in standby mode.
3: VDD18 (Pin 106) and VDD18PLL (Pin 101) must have a 10uF +/-20% Low-ESR (equivalent series resis-
tance) <0.1 ohm bypass capacitor to VSSA. These capacitors must be as close to these pins as possible.
4.2 Buffer Type Descriptions
nTEST[1:0] 95
96
I TEST input:
These signals are used for testing the chip. User should normally
tie them high externally, if the test function is not used.
Digital Power, Grounds and no Connects
VDD18 49
106
1.8v Digital Core Power:
+1.8V Core power
All VDD18 pins must be connected together on the circuit board.
VDD33 3
43
80
100
108
3.3v Power & Voltage Regulator Input:
3.3V Power & Regulator Input.
Pins 100 & 108 supply 3.3V power to the internal 1.8V regulators.
VSS 15
16
47
84
85
97
112
Ground:
Ground Reference
TABLE 4-1: USB2227/USB2228 BUFFER TYPE DESCRIPTIONS
Buffer Description
I Input
IPU Input with internal weak pull-up resistor.
IPD Input with internal weak pull-down resistor.
IS Input with Schmitt trigger
I/O8 Input/Output buffer with 8mA sink and 8mA source.
I/O8PU Input/Output buffer with 8mA sink and 8mA source, with an
internal weak pull-up resistor.
I/O8PD Input/Output buffer with 8mA sink and 8mA source, with an
internal weak pull-down resistor.
O8 Output buffer with 8mA sink and 8mA source.
O8PU Output buffer with 8mA sink and 8mA source, with an internal
weak pull-up resistor.
O8PD Output buffer with 8mA sink and 8mA source, with an internal
weak pull-down resistor.
ICLKx XTAL clock input
OCLKx XTAL clock output
I/O-U Analog Input/Output Defined in USB specification
AIO Analog Input/Output
Symbol
128-Pin
VTQFP
Buffer Type Description
2007-2016 Microchip Technology Inc. DS00002256A-page 15
USB2227/USB2228
5.0 DC PARAMETERS
5.1 Maximum Ratings
Note 1: Stresses above the specified parameters may cause permanent damage to the device. This is a stress rat-
ing only and functional operation of the device at any condition above those indicated in the operation sec-
tions of this specification is not implied.
2: When powering this device from laboratory or system power supplies, it is important that the Absolute Max-
imum Ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on
their outputs when the AC power is switched on or off. In addition, voltage transients on the AC power line
may appear on the DC output. When this possibility exists, it is suggested that a clamp circuit be used.
Parameter Symbol MIN MAX Units Comments
Storage
Temperature
T
A
-55 150 °C
Lead
Temperature
325 °C Soldering < 10 seconds
3.3V supply
voltage
V
DD33,
V
DDA33
-0.5 4.0 V
Voltage on
GPIO3 &
USBDP/DM
pins
-0.5 (3.3V supply voltage + 2) 6V
Voltage on
GPIO8,10&11
-0.5 V
DD33
+ 0.3 V When internal power FET
operation of these pins is
enabled, these pins may be
simultaneously shorted to
ground or any voltage up to
3.63V indefinitely, without
damage to the device as
long as V
DD33
and V
DDA33
are less than 3.63V and T
A
is
less than 70°C.
Voltage on any
signal pin
-0.5 V
DD33
+ 0.3 V
Voltage on
XTAL1
-0.5 4.0 V
Voltage on
XTAL2
-0.5 V
DD18
+ 0.3 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

USB2227-NU-09

Mfr. #:
Buy USB2227-NU-09
Manufacturer:
Microchip Technology
Description:
USB Interface IC USB 2.0 Flash Media Card
Lifecycle:
New from this manufacturer.
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