ES1938 ESS Technology, Inc., ES1938 Datasheet - Page 3

• Manufacturer Part Number: ES1938
• Manufacturer: ESS Technology, Inc.

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