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Table 2-11
ESS1688W Pin Descriptions (continued)
Pin name
Number
Digital Pins
DRQA, B, C
65, 63, 59
DACKBA, B, C
66, 64, 62
PCSPKI
72
FSR
86
FSX
8S7
DCLK
88
DR
89
DX
90
MSD
91
MCLK
92
SE
93
VDDA
39
GNDA
37
MIC
36
LINE L, R
44, 45
AUXA L,R
34, 35
AUXB L,R
32, 33
I/O
O
Active high DMA request to ISA bus. Unselected DRQ outputs
are high impedance. When DMA is not active, the selected
DRQ output has a pulldown device that holds the DRQ line
inactive unless another device that shares the same DRQ line
can source enough current to make the DRQ line active. DRQs
are selected after external reset based on the settings of inputs
DS1 and DS0, and can be reprogrammed thereafter.
I
Active low DMA acknowledge inputs from ISA bus.
I
Normally low digital PC speaker signal input. This signal is
converted to an analog signal with volume control and appears
on analog output PCSPKO.
I
Input with internal pull-down. Frame Sync for Receive data from
external DSP. Programmable for active high or active low.
I
Input with internal pull-down. Frame Sync for Transmit request
from external DSP. Programmable for active high or active low.
I
Input with internal pull-down. Serial data clock from external
DSP. Typically 2.048 MHz.
I
Input with internal pull-down. Data Receive pin from external
DSP.
0
Tri-state output. Data Transmit to external DSP. High
impedance when not transmitting.
I
Input with internal pull-down. Music Serial Data from external
ES689 Music Synthesizer.
I
Input with internal pull-down. Music Serial Clock from external
ES689 Music Synthesizer.
I
Input with internal pull-down. Active high to enable serial mode,
i.e., enables an external DSP to control analog resources of the
ES1688W through the DSP serial interface.
I
Analog supply voltage (4.5V to 5.5V). Should be greater than or
equal to VDDD-0.3V.
I
Analog Ground
I
Microphone input. MIC has an internal pull-up resistor to CMR.
I
Line input left, right. LINE L,R has internal pull-up resistors to
CMR.
I
Auxiliary input left, right. AUXA L,R have internal pull-up
resistors to CMR. Normally intended for connection to an
internal or external CD or CD-ROM analog output.
I
Auxiliary input left right. AUXB L,R have internal pull-up
resistors to CMR Normally intended for connection to an
external music synthesizer or other line level source.
Description
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