CS22220 datasheet(16/34 Pages) CIRRUS

16 / 34 page

CS22220 Wireless PCMCIA Controller

16 of 34

DS557PP2

Rev. 3.0

www.cirrus.com

nPCWAIT

Output

The wait signal is asserted by a PC card to delay completion of the

memory access or I/O access.

nIOIS16

Output

The nIOIS16 output signal is asserted when the address at the socket

corresponds to an I/O address to which the card responds, and the I/O

port addressed is capable of 16-bit access.

nPCINPACK

Output

Input port acknowledge. This output signal is asserted when the PC card

is selected and can respond to an I/O read cycle at the address on the

address bus.

nPCIORD

Input

The host asserts nIORD to read data from a PC card’s I/O space.

nPCIOWR

Input

The host asserts nPCIOWR to write data to a PC card’s I/O space.

System and PC Card Reset

EXT_RESET

Input

The reset signal clears the configuration option register and places the

card in an unconfigured state.The system must place the RESET signal in

a high-Z state during card power up. The signal must remain high

impedance for at least 1 msec after Vcc becomes valid.

JTAG Interface

TDO

Output

Test data output. This input has an integral pull up.

TDI

Input

Test data input.

TCK

Input

Test clock signal.

TMS

Input

Test mode select. This input has an internal pull up.

nTRST

Input

Test interface reset. This input has an internal pull up.

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