USB97C223-NU SMSC [SMSC Corporation], USB97C223-NU Datasheet - Page 12

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

Revision 1.5 (01-06-05)
CF Hardware
Reset
CF IO Read
CF IO Write
Strobe
SM Write
Protect
SM Address
Strobe
SM Command
Strobe
SM Data7-0
SM Read
Enable
SM Write
Enable
SM Write
Protect Switch
SM Busy or
Data Ready
SM Chip
Enable
SM Card
Detection
MS Bus State
MS System
Data In/Out
MS System
Data In/Out
MS System
Data In/Out
MS Card
Insertion
NAME
CF_nRESET
SM_nWPS
SM_D[7:0]
MS_D[3:2]
CF_nIOW
MS_SDIO
SYMBOL
SM_nB/R
CF_nIOR
SM_nWP
SM_nWE
SM_CLE
SM_nRE
SM_nCE
SM_nCD
SM_ALE
/MS_D0
MS_INS
MS_BS
MS_D1
BUFFER
IO8PD
TYPE
MEMORY STICK INTERFACE
I/O8
I/O8
I/O8
IPU
IPU
IPU
O8
O8
O8
O8
O8
O8
O8
O8
O8
O8
DATASHEET
I
SmartMedia INTERFACE
This pin is an active low hardware reset signal to CF
device.
This pin is an active low read strobe signal for CF device,
when the CFC is enabled.
This pin is an active low write strobe signal for CF device,
when the CFC is enabled.
This pin is an active low write protect signal for the SM
device, when the SMC is enabled.
This pin is an active high Address Latch Enable signal for
the SM device, when the SMC is enabled.
This pin is an active high Command Latch Enable signal
for the SM device, when the SMC is enabled.
These pins are the bi-directional data signal SM_D7-
SM_D0, when the SMC is enabled.
This pin is an active low read strobe signal for SM device,
when SMC is enabled.
This pin is an active low write strobe signal for SM device,
when SMC is enabled.
A write-protect seal is detected, when this pin is low.
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 should be attached to the power of
SM/NAND flash device.
This pin is the active low chip enable signal to the SM
device.
This is the card detection signal from SM device to
indicate if the device is inserted.
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 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.
This pin is a bi-directional data signal for the MS device.
The bi-directional data signal has an internal weak pull-
down resistor that is internally controlled.
This pin is a bi-directional data signal for the MS device.
The bi-directional data signal has an internal weak pull-
down resistor.
This pin is the card detection signal from the MS device to
indicate, if the device is inserted.
Page 12
DESCRIPTION
Bus Powered USB 2.0 Flash Media Controller
SMSC USB97C223
Datasheet