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USB2227-NU-11

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
2007-2016 Microchip Technology Inc. DS00002256A-page 7
USB2227/USB2228
4.0 PIN DESCRIPTIONS
This section provides a detailed description of each signal. The signals are arranged in functional groups according to
their associated interface.
The “n” symbol in the signal name indicates that the active, or asserted state occurs when the signal is at a low voltage
level. When “n” is not present before the signal name, the signal is asserted when at the high voltage level.
The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture of
“active low” and “active high” signal. The term assert, or assertion indicates that a signal is active, independent of
whether that level is represented by a high or low voltage. The term negate, or negation indicates that a signal is inactive.
4.1 PIN Descriptions
Symbol
128-Pin
VTQFP
Buffer Type Description
CompactFlash (In True IDE Mode) Interface
CF_nCS1 61 O8PU CF Chip Select 1:
This pin is the active low chip select 1 signal for the CF ATA
device.
CF_nCS0 60 O8PU CF Chip Select 0:
This pin is the active low chip select 0 signal for the task file
registers of CF ATA device in the True IDE mode.
CF_SA2 64 O8 CF Register Address 2:
This pin is the register select address bit 2 for the CF ATA device.
CF_SA1 63 O8 CF Register Address 1:
This pin is the register select address bit 1 for the CF ATA device.
CF_SA0 62 O8 CF Register Address 0:
This pin is the register select address bit 0 for the CF ATA device.
CF_IRQ 55 IPD CF Interrupt:
This is the active high interrupt request signal from the CF device.
CF_D[15:8] 52
51
50
48
46
45
41
40
I/O8PD CF Data 15-8:
The bi-directional data signals CF_D15-CF_D8 in True IDE mode
data transfer.
In the True IDE Mode, all of task file register operation occur on
the CF_D[7:0], while the data transfer is on CF_D[15:0].
The bi-directional data signal has an internal weak pull-down
resistor.
CF_D[7:0] 39
38
37
36
35
34
33
32
I/O8PD CF Data 7-0:
The bi-directional data signals CF_D7-CF_D0 in the True IDE
mode data transfer.
In the True IDE Mode, all of task file register operation occur on
the CF_D[7:0], while the data transfer is on CF_D[15:0].
The bi-directional data signal has an internal weak pull-down
resistor.
CF_IORDY 56 IPU IO Ready:
This pin is active high input signal.
This pin has an internally controlled weak pull-up resistor.
USB2227/USB2228
DS00002256A-page 8 2007-2016 Microchip Technology Inc.
CF_nCD2 54 IPU CF Card Detection2:
This card detection pin is connected to the ground on the CF
device, when the CF device is inserted.
This pin has an internally controlled weak pull-up resistor.
CF_nCD1 53 IPU CF Card Detection1:
This card detection pin is connected to ground on the CF device,
when the CF device is inserted.
This pin has an internally controlled weak pull-up resistor.
CF_nRESET 59 O8 CF Hardware Reset:
This pin is an active low hardware reset signal to CF device.
CF_nIOR 57 O8 CF IO Read:
This pin is an active low read strobe signal for CF device.
CF_nIOW 58 O8 CF IO Write Strobe:
This pin is an active low write strobe signal for CF device.
SmartMedia Interface
SM_nWP 74 O8PD SM Write Protect:
This pin is an active low write protect signal for the SM device.
This pin has a weak pull-down resistor that is permanently
enabled.
SM_ALE 73 O8PD SM Address Strobe:
This pin is an active high Address Latch Enable signal for the SM
device.
This pin has a weak pull-down resistor that is permanently
enabled.
SM_CLE 75 O8PD SM Command Strobe:
This pin is an active high Command Latch Enable signal for the
SM device.
This pin has a weak pull-down resistor that is permanently
enabled.
SM_D[7:0] 72
71
70
69
68
67
66
65
I/O8PD SM Data 7-0:
These pins are the bi-directional data signal SM_D7-SM_D0.
The bi-directional data signal has an internal weak pull-down
resistor.
SM_nRE 81 08PU SM Read Enable:
This pin is an active low read strobe signal for SM device.
When using the internal FET, this pin has an internal weak pull-
up resistor that is tied to the output of the internal Power FET.
08 If an external FET is used (Internal FET is disabled), then the
internal pull-up is not available (external pull-ups must be used,
and should be connected to the applicable Card Power Supply).
Symbol
128-Pin
VTQFP
Buffer Type Description
2007-2016 Microchip Technology Inc. DS00002256A-page 9
USB2227/USB2228
SM_nWE 82 O8PU SM Write Enable:
This pin is an active low write strobe signal for SM device.
When using the internal FET, this pin has an internal weak pull-
up resistor that is tied to the output of the internal Power FET.
08 If an external FET is used (Internal FET is disabled), then the
internal pull-up is not available (external pull-ups must be used,
and should be connected to the applicable Card Power Supply).
SM_nWPS 76 IPU SM Write Protect Switch:
A write-protect seal is detected, when this pin is low.
This pin has an internally controlled weak pull-up resistor.
SM_nB/R 77 I SM Busy or Data Ready:
This pin is connected to the BSY/RDY pin of the SM device.
An external pull-up resistor is required on this signal. The pull-up
resistor must be pulled up to the same power source that powers
the SM/NAND flash device.
SM_nCE 83 O8PU SM Chip Enable:
This pin is the active low chip enable signal to the SM device.
When using the internal FET, this pin has an internal weak pull-
up resistor that is tied to the output of the internal Power FET.
08 If an external FET is used (Internal FET is disabled), then the
internal pull-up is not available (external pull-ups must be used,
and should be connected to the applicable Card Power Supply).
SM_nCD 78 IPU SM Card Detection:
This is the card detection signal from SM device to indicate if the
device is inserted.
This pin has an internally controlled weak pull-up resistor.
Memory Stick Interface
MS_BS 24 O8 MS Bus State:
This pin is connected to the BS pin of the MS device.
It is used to control the Bus States 0, 1, 2 and 3 (BS0, BS1, BS2
and BS3) of the MS device.
MS_SDIO/MS_D
0
19 I/O8PD MS System Data In/Out:
This pin is a bi-directional data signal for the MS device.
Most significant bit (MSB) of each byte is transmitted first by
either MSC or MS device.
The bi-directional data signal has an internal weak pull-down
resistor.
MS_D1 20 I/O8PD MS System Data In/Out:
This pin is a bi-directional data signal for the MS device.
This pin has internally controlled weak pull-up and pull-down
resistors for various operational modes.
Symbol
128-Pin
VTQFP
Buffer Type Description
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

USB2227-NU-11

Mfr. #:
Buy USB2227-NU-11
Manufacturer:
Microchip Technology
Description:
USB Interface IC USB 2.0 Flash Media Card Controller
Lifecycle:
New from this manufacturer.
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