ES1938 Datasheet, PDF (3/4 Pages) List of Unclassifed Manufacturers – PCI AudioDrive Solution Product Brief

ES1938 PRODUCT BRIEF
ES1938 PIN DESCRIPTIONS
Table 1 lists the ES1938 pin descriptions.
Table 1 ES1938 Pin Descriptions
Names
Pin Numbers I/O
Descriptions
VDDD
1, 17, 64, 80 I Digital supply voltage (5V±5%).
AD[31:0]
2:7, 9:16, I/O Address and data lines from the PCI bus.
69:76, 79,
82:88, 98:99
CBE[3:0]B
8, 77, 89, 97 I/O PCI command/byte enable.
XO
18
O Oscillator output. Connect to external 14.318-MHz crystal.
XI
19
I Oscillator/external clock input. Connect to external 14.318-MHz crystal or clock source
(must be CMOS levels).
VOLDN
20
I Active-low volume decrease button input with internal pull-up.
VOLUP
21
I Active-low volume increase button input with internal pull-up.
MCLK
22
I Input with internal pull-down. Music serial clock from external wavetable music synthesizer.
MSD
23
I Input with internal pull-down. Music serial data from external wavetable music synthesizer.
GNDD
24, 52, 81,
100
I Digital ground.
MONO_OUT
25
O Mono output with source select and volume control (including mute). This pin can drive an
external 5k AC load.
MONO_IN
26
I Mono input to mixer and ADC. This pin has an internal pull-up to CMR.
T(A-D)
30:27
I/O Joystick timer. These pins connect to the X-Y positioning variable resistors for the two
joysticks.
SW(A-D)
31:34
I Active-low joystick switch setting inputs. These SW pins have an internal pull-up resistor.
AUXB_L,
AUXB_R
35, 36
I Auxiliary B inputs, left and right. AUXB_L and AUXB_R have internal pull-up resistors to
CMR.
AUXA_L,
AUXA_R
37, 38
I Auxiliary A inputs, left and right. AUXA_L and AUXA_R have internal pull-up resistors to
CMR. Normally intended for connection to an internal or external CD-ROM analog output.
CMR
39
O Common mode reference voltage (2.25V±5%). Bypass this pin to analog ground with
47-µF electrolytic in parallel with a 0.1-µF capacitor.
MIC
40
I Microphone input. MIC has an internal pull-up resistor to CMR.
GNDA
41
I Analog ground.
CAP3D
42
I Bypass capacitor to analog ground for 3D effects.
VDDA
43
I Analog supply voltage (5V±5%). Must be greater than or equal to VDDD –0.3V.
FOUT_R,
FOUT_L
44, 45
O Filter outputs, left and right. AC-coupled externally to CIN_L and CIN_R to remove DC
offsets.
CIN_L, CIN_R
46, 47
I ADC and first channel DAC mixer inputs. These pins have internal 50k pull-up resistors to
CMR.
LINE_L, LINE_R 48, 49
I Line inputs, left and right. LINE_L and LINE_R have internal pull-up resistors to CMR.
AOUT_L,
AOUT_R
50, 51
O Line-level stereo outputs, left and right. These pins can drive a 5k ohm AC load.
ESS Technology, Inc.
SAM0290-030601
3