USB97C223-NU SMSC [SMSC Corporation], USB97C223-NU Datasheet - Page 11

• Manufacturer Part Number: USB97C223-NU
• Description: Bus Powered USB 2.0 Flash Media Controller
• Manufacturer: SMSC [SMSC Corporation]

Bus Powered USB 2.0 Flash Media Controller
Datasheet
Chapter 6
6.1
SMSC USB97C223
CF Chip Select
1
CF Chip Select
0
CF Register
Address 2
CF Register
Address 1
CF Register
Address 0
CF Interrupt
CF Data 15-8
CF Data7-0
IO Ready
CF Card
Detection2
CF Card
Detection1
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 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.
Pin Descriptions
CF_D[15:8]
CF_IORDY
CF_D[7:0]
CF_nCS1
CF_nCS0
CF_nCD2
CF_nCD1
SYMBOL
CF_SA2
CF_SA1
CF_SA0
CF_IRQ
Pin Descriptions
CompactFlash (In True IDE mode) INTERFACE
BUFFER
TYPE
I/O8
I/O8
IPD
IPU
IPU
IPU
O8
O8
O8
O8
O8
Table 6.1 - Pin Description
DATASHEET
This pin is the active low chip select 1 signal for the CF
ATA device
This pin is the active low chip select 0 signal for the task
file registers of CF ATA device in the True IDE mode.
This pin is the register select address bit 2 for the CF
device.
This pin is the register select address bit 1 for the CF
device.
This pin is the register select address bit 0 for the CF
device.
This is the active high interrupt request signal from the CF
device.
The bi-directional data signals CF_D15-CF_D8 in True
IDE mode data transfer. The bi-directional data signal has
an internal weak pull-down resistor.
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.
This pin is active high input signal from CF card.
This card detection pin is connected to the ground on the
CF device, when the CF device is inserted.
This card detection pin is connected to ground on the CF
device, when the CF device is inserted.
Page 11
DESCRIPTION
Revision 1.5 (01-06-05)