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ESMT AD62551A
USB controller with external Amplifier and Recording function
Features
z Compliant with USB Specification v1.1, and USB
2.0 full speed
z Support I
master mode
Sampling frequencies(Fs)：48kHz
z Support recording function
z Supports Win Me//2000/XP and MacOS
z True plug-and-play application, no driver is
required for basic USB speaker application
z Support volume/mute control with external button
z Built-in 5V to 3.3V regulator for internal device
2
S input and I2S output interface of
Functional Block Diagram
operation
z 12 MHz Crystal Input
z 32-pin LQFP(Pb free)
Description
AD62551A is a USB audio controller with I2S
interface and supports recording function. The
device also has an I
2
S output port allows other high performance
The I
audio device (i.e. AD8356A/AD8256A) to be
controlled by AD62551A.
2
S input port and I2S output port.
Elite Semiconductor Memory Technology Inc. Publication Date: Apr. 2007
Revision: 1.2 1/10
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ESMT AD62551A
Pin Assignment
Pin Description
Pin Name Type Description Characteristics
1 MSDA I/O I2C’s SDA of Master mode Schmitt trigger TTL input buffer
2 MSCL O I2C’s SCL of master mode
3
4 SDATAO O
5 LRCIN O
6 BCLK O
7 SDATAI I Serial audio data input Schmitt trigger TTL input buffer
8 MCLK O Master clock(256xFs)
PDO
O
Power-down output (Note1)
Serial audio output (Note1)
L/R clock output(Fs) (Note1)
BCLK output(64xFs) (Note1)
9 GND P Ground
10 NC NC No connection
11 NC NC No connection
12 VDD P 5V supply voltage
Elite Semiconductor Memory Technology Inc. Publication Date: Apr. 2007
Revision: 1.2 2/10
Page 3
ESMT AD62551A
13 VDD P 5V supply voltage
14 NC NC No connection
15 NC NC No connection
16 GND P Ground
17
2
S/IUSB
I Low is USB mode, high is I
18 NC NC No connection
19 SEL I Mode selection bit Schmitt trigger TTL input buffer
20 XO O Crystal output
21 XI I Crystal input
22 GND P Ground
23 REGO O 3.3V regulator output
24 VDD P 5V supply voltage
25 USBDM I/O USB data D-
26 USBDP I/O USB data D+
27 GND P Ground
2
S mode Schmitt trigger TTL input buffer
28
29
30
31
32
VOLDN
VOLUP
MUTE
ERROR
RESET
I Volume down, low active With internal pull-up resistor
I Volume up, low active With internal pull-up resistor
I Power-down and mute of Class D Schmitt trigger TTL input buffer
O Error output Open-Drain output
I Reset signal Schmitt trigger TTL input buffer
Note1: Must be strapped resistor 1MΩ to 3.3V(REGO) or GND. BCLK, LRCIN and PDO must be strapped
to GND. SDATAO is strapped to GND when AD62551A is button mode, otherwise strapped to 3.3V
when AD62551A is I
2
C slave mode.
Absolute Maximum Ratings
Symbol Parameter Min Max Units
VDD
V
T
stg
T
a
i
Supply for regulator input 0 5.5 V
Input Voltage -0.3 3.6 V
Storage Temperature -65 150
Ambient Operating Temperature 0 70
o
C
o
C
Recommended Operating Conditions
Symbol Parameter Typ Units
VDD
Ta Ambient Operating Temperature 0~70 oC
Supply for regulator input 4.5~5.5 V
Elite Semiconductor Memory Technology Inc. Publication Date: Apr. 2007
Revision: 1.2 3/10
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