Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -17- Pin Descriptions
AC’97 Audio and Modem Pin Descriptions
AC97 Audio / Modem Interface
Signal Name Pin # I/O Signal Description
ACRST#
T3 O
AC97 Reset.
ACBTCK
T1 I
AC97 Bit Clock.
ACSYNC / strap T2 O
AC97 Sync.
ACSDOUT / strap U2 O
AC97 Serial Data Out.
ACSDIN0 (VSUS33)† U3 I
AC97 Serial Data In 0.
ACSDIN1 (VSUS33)† V2 I
AC97 Serial Data In 1.
ACSDIN2 / GPIO20 / PCS0# U1 I AC97 Serial Data In 2. RxE4[6]=0,E5[1]=0, PMIO Rx4C[20]=1
ACSDIN3 / GPIO21 / PCS1# / SLPBTN# V3 I AC97 Serial Data In 3. RxE4[6]=0,E5[2]=0, PMIO Rx4C[21]=1
†The supply voltage for ACSDIN0-1 is VSUS33 so these inputs can support wake-up on modem ring.
Serial IRQ and PC / PCI DMA Pin Descriptions
Serial IRQ
Signal Name Pin # I/O Signal Description
SERIRQ
AD9 I Serial IRQ. This pin has an internal pull-up resistor.
PC / PCI DMA
Signal Name Pin # I/O Signal Description
PCREQA / GPI24 / GPO24 (GPIOA) AE5 I PC / PCI Request A. Device 17 Function 0 Rx53[7] = 1
PCREQB / GPI25 / GPO25 (GPIOB) AD5 I PC / PCI Request B. Device 17 Function 0 Rx58[7] = 1
PCGNTA / GPI30 / GPO30 (GPIOC) AF5 O PC / PCI Grant A. Device 17 Function 0 Rx53[7] = 1
PCGNTB / GPI31 / GPO31 (GPIOD) AC6 O PC / PCI Grant B. Device 17 Function 0 Rx58[7] = 1