CS4630

DS445PP1

33

VOLUP/XTALI - Volume-Up Button / Crystal In, Input

This dual function pin is either the volume-up button control input or the crystal oscillator input

pin, depending on system configuration. This pin may also be used as a general purpose input

if its primary function is not needed.

VOLDN/XTALO - Volume-Down Button / Crystal Output, I/O

This dual function pin is either the volume-down button control input or the crystal oscillator

output pin, depending on system configuration. This pin may also be used as a general purpose

input if its primary function is not needed.

12.4 Clock / Miscellaneous

CLKRUN# - Optional System Clock Control, Open Drain Output, Active Low

CLKRUN# is an optional PCI signal defined for mobile operations. This is a Bidirectional pin

indicating that the PCI clock is required. This signal pin is not available on the add-in card

connector.

CRYVDD - Crystal & PLL Power Supply

Power pin for crystal oscillator and internal phase locked loop. This pin must be connected to a

nominal +3.3 Volts.

CRYGND - Crystal & PLL Ground Supply

Ground pin for crystal oscillator and internal phase locked loop.

JACX, JACY, JBCX, JBCY - Joystick A and B X/Y Coordinates, I/O

These pins are the 4 axis coordinates for the joystick port. These pins may also be used as

general purpose inputs or open drain outputs if their primary function is not needed.

JAB1/SDO2 - Joystick A Button 1 / Serial Data Output 2, I/O

This dual function pin defaults as JAB1 (button 1 input for joystick A). In non-AC ’97 system

configurations, this pin can function as a second stereo digital data output pin if enabled. This

pin can also be a general purpose polled input if a second data output stream is not required.

JAB2/SDO3 - Joystick A Button 2 / Serial Data Output 3, I/O

This dual function pin defaults as JAB2 (button 2 input for joystick A). In non-AC ’97 system

configurations, this pin can function as a third stereo digital data output pin if enabled. This pin

can also be a general purpose polled input if a third data output stream is not required.

JBB1/LRCLK - Joystick B Button 1 / L/R Framing Clock, I/O

This dual function pin defaults as JBB1 (button 1 input for joystick B). In non-AC ’97 system

configurations, this pin can function as a left/right framing clock output pin for SDO2 and

SDO3. This pin can also be used as a general purpose polled input if alternate data output

streams are not required.