Acer Extensa 390 Service Guide

Major Chips Description2-45 Table 2-5M1533 Numerical Pin ListNo.NameTypeNo.NameTypeR20GPO13/IRQ1OOV7LA22I/OR19GPO14/IRQ12OOT7LA23I/OR18GPO15/IRQ0OM19LBJIR17GPO16APICCSJOM20LIDIR16GPO17/APICGNTJOK16LLBJIP17GPO18/BIOSA16OV6M16JI/OP16GPO19/BIOSA17OW9MEMRJI/OTable 2-5M1533 Numerical Pin...

2-46Service GuideTable 2-5M1533 Numerical Pin...

Major Chips Description2-47 2.3 FDC37C672
The FDC37C672 is a 100-pin enhanced super l/O controller with Fast IR.
2.3.1 Features
· 5 Volt Operation
· PC97 Compliant
· ISA Plug and Play Compatible Register Set
· Intelligent Auto Power Management
· Shadowed Write-only Registers for ACPI Compliance
· System Management Interrupt, Watchdog Timer
· 2.88MB Super l/O Floppy Disk Controller
· Licensed CMOS 765B Floppy Disk Controller
· Software and Register Compatible with SMCs Proprietary 82077AA Compatible Core...

2-48Service Guide· Four Open Drain Outputs Dedicated for Keyboard/Mouse Interface
· Asynchronous Access to Two Data Registers and One Status Register
· Supports Interrupt and Polling Access
· 8it Counter Timer
· Port 92 Support
· 8042 P12 and P16 Outputs
· Serial Ports
· Two Full Function Serial Ports
· High Speed NS16C550 Compatible UARTs with Send/Receive 16yte FlFOs
· Supports 230k and 460k Baud Programmable Baud Rate Generator Modem Control
Circuitry
· 480 Address and Eight IRQ Options
· Infrared...

Major Chips Description2-49 2.3.2 General Description
The FDC37C67x with Consumer IR and IrDA v 1.1 support incorporates a keyboard interface,
SMCs true CMOS 765B floppy disk controller, advanced digital data separator, two 16C550
compatible UARTs, one Multi-Mode parallel port which includes ChiProtect circuitry plus EPP and
ECP, on-chip 24 mA AT bus drivers, two floppy direct drive support, Intelligent power management
and SMI support. The true CMOS 765B core provides 100% compatibility with IBM PC/XT...

2-50Service Guide2.3.3 Pin ConfigurationFigure 2-4FDC37C67 (TQFP) Pin Diagram 

Major Chips Description2-51Figure 2-5FDC37C67 (QFP) Pin Diagram 

2-52Service Guide2.3.4 Pin Descriptions
Table 2-6FDC37C67 Pin DescriptionsPin No./QFPPin NameTypeSymbolBuffer TypeProcessor / Host Interface (34)E37:40, 42:45System Data Bus8SD[0:7]IO2420:3011-bit System Address Bus11SA[0:10]I31Chip select/SA11 (Note 1)1nCS/SA11I36Address Enable1AENI55I/O Channel Ready1IOCHRDYOD2446ISA Reset Drive1RESET_DRVIS33Serial IRQ/Parallel IRQ_31SER_IRQ/IRQ3IO24/O24/D24(Note
0)32PCI Clock for Serial IRQ (33
MHz/30MHz)/Parallel IRQ_41PCI_CLK/IRQ4IO24/O24/D24(Note
0)50DMA Request...

Major Chips Description2-53 Table 2-6FDC37C67 Pin DescriptionsPin No./QFPPin NameTypeSymbolBuffer Type3Maor On D1nMTR0O224/OD246Motor On 11nMTR1O224/OD2415Write Protected1nWRTPRTIS14Track O1nTRKOIS13Index Pulse Input1nINDEXIS1Drive Density Select O1DRVDENOO224/OD242Drive Density Select 1 /IR Mode
Select/lRRX31DRVDEN1/IR
MODE/ IRRX3O224/OD24/O24/ISerial Port 1 Interface(8)84Receive Serial Data 11RXD1I85Transmit Serial Data 11TXD1O487Request to Send 11nRTS1/SYSOPO4/I88Clear to Send 11nCTS 1I89Data Terminal...

2-54Service GuideTable 2-6FDC37C67 Pin DescriptionsPin No./QFPPin NameTypeSymbolBuffer Type78Paper End1PEI77Printer Selected1SLCTI81Error at Printer1nERRORIKeyboard/Mouse Interface (6)56Keyboard Data .1KDATIOD16P57Keyboard Clock1KCLKIOD16P58Mouse Data1MDATIOD16P59Mouse Clock1MCLKIOD16P63Keyboard Reset1KBDRST(Note 3)O464Gate A201A20MO4Note 0:  The interrupt request is output on one of the IRQx signals as an 024 buffer type. If EPP or ECP
Mode is enabled, this output is pulsed low, then released to allow...