Acer extensa 670 Service Manual

The ES1878 is a member of the ESS family of audio controllers that includes the ES1868. It shares
most of the features of the ES1868. and includes new features, such as support for the expansion
audio mixer chip, the ES978, and a new IIS serial port and stereo D/A converter. A 4-wire expansion
analog bus and 2-wire serial control bus connect the ES1878 and the ES978

• 

Hot-dock interface to expansion audio mixer (ES978)

• 

Plug-and-Play support using internal resource ROM.

• 

Monophonic full-duplex using two DMA channels.

• 

Self-timed joystick port ("digital joystick")

• 

Support for up to 7 general purpose outputs and 7 general purpose inputs that can be slaved
with corresponding pins of ES978 in expansion unit

• 

IIS interface to intemal stereo D/A for external ZV port or MPEG audio

• 

Completely general interrupt mapping, including sharing all interrupts

GNDD

A0

A1

A2

A2

A4

A5

A6

A7

A8

A9

A10

A11

AEN

VDDD

D0

D1

D2

D3

D4

D5

D6

D7

GNDD

SWD

Xl

VDDD 

RESET 

DOCKED 

IIMCLK

llLR

IISLCK

IIDATA 

MSD

MCLK

FS

DCLK

DR

DX 

GNDD 

MSI

MSO

VDDD

XSC

XSD

GNDA 

XA0

XA1

XA2

XA3

GPI1

GPIO

GNDD 

PCsPKI 

XO

GPO0
GPO1
GPO2

DRQC / GPI2

DACKBC / GPI3

DRQB

DACKBB

DRQA

DACKBA

MUTE / GPI6

VOLUP / GPI5

VOLDN / GPI4

IRQE / GPO6

IRQD / GPO5
IRQC / GPO4
IRQC / GPO3

IRQA
IORB

IOWB

VDDD

PCSPKO
AOUT_R
AOUT_L
LINE_R
LINE_L
CIN_R
CIN_L
FOUT_L
FOUT_R
VDDA
VREF
GNDA
MIC
CMR
AUXA_R
AUXA_L
AUXB_R / FDXO
AUXB_L / FDXI
TA
TB
SWC
SWB
SWA
TD
TC

100

1

25

26

51

50

75

76