Acer Extensa 610 Service Guide

2-84Service GuideTable 2-14NS87336VJG Pin Descriptions (continued)PinNo.I/ODescription/MSEN0
/MSEN1
(Normal Mode)50, 49IMedia Sense.  These pins are Media Sense input pins when bit 0 of
FCR is 0.  Each pin has a 10 KW internal pull-up resistor.  When bit 0
of FCR is 1, these pins are Data Rate output pins and the pull-up
resistors are disabled./MSEN0
/MSEN1
(PPM Mode)86, 84IMedia Sense.  These pins gives additional Media Sense signals for
PPM Mode and PNF = 0./MTR0
/MTR1
(Normal Mode)44, 41OFDC Motor...

Major Chips Description2-85Table 2-14NS87336VJG Pin Descriptions (continued)PinNo.I/ODescription/RI1
/RI268, 60IUARTs Ring Indicator.  When low, this indicates that a telephone ring
signal has been received by the modem.  The /RI signal is a modem
status input whose condition is tested by the CPU by reading bit 6
(RI) of the Modem Status Register (MSR) for the appropriate serial
channel.  Bit 6 is the complement of the RI signal.  Bit 2 ( TERI) of
the MSR indicates whether the RI input has changed from...

2-86Service GuideTable 2-14NS87336VJG Pin Descriptions (continued)PinNo.I/ODescriptionTC4ITerminal Count.  Control signal from the DMA controller to indicate
the termination of a DMA transfer.  TC is accepted only when FDACK
is active.  TC is active high in PC-AT and Model 30 modes, and
active low in PS/2 mode./TRK0
(Normal Mode)35IFDC Track 0.  This input indicates the controller that the head of the
selected floppy disk drive is at track zero./TRK0
(PPM Mode)91IFDC Track 0.  This pin gives an...

Major Chips Description2-872.8Yamaha YMF715 Audio Chip
YMF715-S (OPL3-SA3) is a single audio chip that integrates OPL3 and its DAC, 16 bit Sigma-
delta CODEC, MPU401 MIDI interface, joystick with timer, and a 3D enhanced controller including
all the analog components which is suitable for multi-media application. This LSI is fully compliant
with Plug and Play ISA 1.0a, and supports all the necessary features, i.e. 16 bit address decode,
more IRQs and DMAs in compliance with PC96. This LSI also supports...

2-88Service Guide2.8.2Pin DiagramFigure 2-17YMF715 Block Diagram 

Major Chips Description2-892.8.3Pin Descriptions
Table 2-15YMF715 DescriptionsPin namePinsI/OTypeSizeFunctionISA bus interface: 36 pinsD7-08I/OTTL24mAData BusAl 1-012ITTL2mAAddress BusAEN1ITTL2mAAddress Bus Enable/IOW1
ISchmitt4mAWrite Enable/IOR1ISchmitt4mARead EnableRESET1ISchmitt4mAResetIRQ3,5,7,9,10,116TTTL12mAInterrupt requestDRQ0,1,33TTTL12mADMA Request/DACK0, 1,33ITTL2mADMA AcknowledgeAnalog Input & Output : 24 sinsOUTL1O--Left mixed analog outputOUTR1O--Right mixed analog outputVREFI1I--Voltage...

2-90Service GuideTable 2-15YMF715 Descriptions (Continued)Pin namePinsI/OTypeSizeFunctionMulti-purpose Dins: 13 pinsSEL2-03I+CMOS2mARefer to “Multi-purpose pins” sectionMP9-0l0I+/OTTL4mARefer to “multi-purpose pins” sectionOthers: 27 pinsGPO - GP34IA--Game PortGP4- GP74I+Schmitt2mAGame PortRXD1I+Schmitt2rnAMIDI Data ReceiveTXD1OTTL4mAMIDI Data Transfer/VOLUP1I+Schmitt2mAHardware Volume (Up)/VOLDWlI+Schmitt2mAHardware Volume (Down)X3311ICMOS2mA33.8688 MHzX33O1OCMOS2mA33.8688 MHzX24I1ICMOS2mA24.576...

Major Chips Description2-912.9T62.062.C Battery Charger
2.9.1Overview
Ambit T62.062.C.00 charger is designed exclusively for TI Extensa 610 notebook computer as a
power management and battery charger module which can charge a 9 cells Nickel-Metal Hydride
(NiMH) or 9 cells with 3’s parallel and 3’s serial Lithium Ion(LIB) Battery pack. When charging the
NiMH battery , the determination of the battery full capacity for the charger is based on zero delta
Voltage (0 V), temperature increment gradient (T/t),...

2-92Service Guide·       Max. T
·       Safety charging timer
·       Battery temperature constantly monitoring
·       Over voltage protect 13V
· Providing low battery warning signals when the system using battery as the main power
source
2.9.3Absolute Maximum Ratings
Table 2-16T62.062.C Absolute Maximum Ratings TableParameterMaximum RatingsSupply voltage ( Adapter)0V to +24VOutput current3ATotal sink current of all O/P pin
(output pin to DC/DC not included)15mACharge current1.9AOperating temperature0...

Major Chips Description2-93Table 2-17T62.062.C Electrical Characteristics Table (Continued)ParameterSymbolConditionMINTYPMAXUNITS OUTPUTAC Source input Signal
           (Voltage)
           (Supply current)AD5VAC source voltage >
8V4.555.25
10V
mABattery in use  (High)
          (Low)
          (Supply current)BAT-IN-USE#@I load=100uA2.755.25
0.7
100V
V
uAPower OutputDCBAT OUT--3ACharge Indicator
           (High)
           (Low)
           (Supply current)BT-QCHGQuick
3.5
-
-5
-
-5.25
0.8
100V
V...