USB2250 SMSC Corporation, USB2250 Datasheet - Page 17

• Manufacturer Part Number: USB2250
• Description: Ultra Fast USB 2.0 Multi-Format Flash Media Controller
• Manufacturer: SMSC Corporation

Ultra Fast USB 2.0 Multi-Format Flash Media Controller
Datasheet
SMSC USB2250/51/59
SM Chip
Enable
SM Card
Detection
GPIO
MS Bus State
MS Card
Insertion GPIO
MS System
CLK
MS System
Data In/Out
MS System
Data In/Out
NAME
Table 5.1 USB2250/51/59 128-Pin VTQFP Pin Descriptions (continued)
MS_SCLK
MS_D[7:1]
MS_SDIO
SYMBOL
(GPIO14)
(GPIO12)
SM_nCE
SM_nCD
MS_D0 /
MS_INS
MS_BS
128-PIN
VTQFP
101
100
54
57
91
98
97
93
95
99
96
92
94
MEMORY STICK INTERFACE
DATASHEET
BUFFER
I/O12PD
I/O12PD
O12PU
TYPE
I/O12
O12
O12
IPU
17
DESCRIPTION
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, and is controlled
by the SM_PU bit of the SMC_CTL register.
If an external FET is used (Internal FET is
disabled), then the internal pull-up is not available
(external pull-ups must be used).
This is a GPIO designated as the Smart Media
card detection pin.
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.
This is a GPIO designated as the Memory Stick
card detection pin.
This pin is an output clock signal to the MS
device.
The clock frequency is software configurable.
MS_D[7:0]: These pins are the bi-directional data
signal for the MS device. MS_D2 and MS_D3
have weak pull-down resistors. MS_D1 has a pull
down resistor if in parallel mode, otherwise it is
disabled. In 4 or 8 bit parallel mode, there is a
weak pull-down resistor on all MS_D7~0 signals.
The resistors are controlled by MSC_SYSTEM_0,
MSC_MODE_CTL and MSC_PRO_HG registers.
MS_D0: This pin is one of the bi-directional data
signals for the MS device. In serial mode, the
most significant bit (MSB) of each byte is
transmitted first by either MSC or MS device on
MS_D0. MS_D0, MS_D2, and MS_D3 have weak
pull-down resistors. MS_D1 has a pull down
resistor if in parallel mode, otherwise it is disabled.
In 4 or 8 bit parallel mode, there is a weak pull-
down resistor on all MS_D7~0 signals. The
resistors are controlled by MSC_SYSTEM_0,
MSC_MODE_CTL and MSC_PRO_HG registers.
MS_SDIO: Serial Data Bus. Transfer direction and
types of data change depending on the Bus State.
Revision 2.6 (05-08-08)