USB2250 SMSC Corporation, USB2250 Datasheet - Page 14

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

Chapter 5 Pin Descriptions
Revision 2.6 (05-08-08)
5.1
CF Chip
Select 0
CF Register
Address
CF Interrupt
CF Data 15-8 /
GPIO
NAME
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 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” signals. 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.
USB2250/51/59 128-Pin VTQFP Pin Descriptions
CF_D[15:8] /
GPIO[31:24]
CF_SA[2:0]
CF_nCS0
SYMBOL
CF_IRQ
Table 5.1 USB2250/51/59 128-Pin VTQFP Pin Descriptions
128-PIN
VTQFP
71
82
83
84
74
70
68
66
62
60
90
89
87
COMPACT FLASH INTERFACE
DATASHEET
BUFFER
I/O12PD
TYPE
I/O12
I/O12
O12
IPD
14
DESCRIPTION
This pin is the active low chip select 0 signal for
the task file registers of CF ATA device in the True
IDE mode.
These pins are the register select address bits for
the CF ATA device.
This is the active high interrupt request signal from
the CF device.
This pin has an internal weak pull-down resistor
that can be controlled by:
CF_INTF_EN bit of CFC_ATA_MODE_CTL
CF_D[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
operations 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.
GPIO[31:24]: These Pins are GPIOs if
CF_INTF_EN bit of CFC_ATA_MODE CTL is
disabled and EXTENDED_GPIO bit is set in
UTIL_CONFIG1 is enabled.
Ultra Fast USB 2.0 Multi-Format Flash Media Controller
SMSC USB2250/51/59
Datasheet