Datasheet

MAX9880A Evaluation Kit
Evaluates: MAX9880A
6 ______________________________________________________________________________________
Detailed Description of Software
The MAX9880A EV kit software is divided into three tabs:
Analog Audio, Digital Audio, and Control Registers.
The analog and digital tabs are image-based tabs, pro-
viding a visualization of the MAX9880A’s (U1) configura-
tion and an interpretation of the register organization.
The control tab provides a map of the device registers,
as well as configuration control of each register bit.
The software also includes a Status group box (see the
Status Register section), five command buttons, a menu
bar, and a status bar. The status bar is used to report EV
kit connectivity, the interface mode, the device’s address
(I
2
C mode), and the device’s revision ID. The functional-
ity of the command buttons is provided in Table 2 and
the menu bar items are discussed in the Menu Bar sec-
tion.
The controls for the device registers are discussed in
subsequent sections, which have been organized in
the same manner as the register descriptions in the
MAX9880A IC data sheet. As such, when evaluating the
EV kit hardware and software, both the IC data sheet and
the EV kit data sheet should be referenced.
Menu Bar
The software’s menu bar provides five drop-down menus:
File, View, Options, Tools, and Help. Their associated
menu items are listed and detailed in Table 3.
Table 2. Command Buttons
Table 3. Menu Bar Items
BUTTON FUNCTIONALITY
Read All
Reads all device registers and updates all three tabs to reflect the state of the device registers.
Write All
Writes all the hex values (0x??) shown on the Control Registers tab to the associated register on
the U1 device.
Reset
Resets the device to its power-on-reset (POR) state.
Connect
Attempts to establish a connection to the EV kit. First establishing a connection with the EV kit’s
on-board microcontroller (MAXQ2000) and then with the device.
MAX9880A Power
Toggles the device SHDN bit. When enabled, the button’s image turns blue.
MENU ITEMS DESCRIPTION
File
| Load Settings CTRL+O
Loads/saves a .ax27 configuration file (see the Save/Load Settings section).
| Save Settings CTRL+S
| Exit
Closes the software.
View
| Show S/PDIF Transceiver
Registers
Enables the CS8427 register tab, providing access to the digital audio transceiver’s (U11)
registers (refer to the Cirrus Logic CS8427 data sheet for details).
Options
| Auto Connect
Enables continuous device detection.
| Auto Read Status
Enables polling of the Status register (0x00).
| Interrupt Enables
Set/clear the device’s interrupt enables.
| I
2
C Clock Speed
Provides I
2
C clock options: 100kHz or 400kHz.
Tools
| Interface (Advanced User) F1
Opens the Advanced User Interface window (see the Advanced User Interface section).
| Quick Start F3
Automatically establishes a connection with the EV kit and the U1 device (I
2
C mode only),
then enables the U1 device and configures it for USB audio input (see the Quick Start sec-
tion for hardware setup).
| Quick Connect F4
Establishes a connection with the EV kit and the U1 device (I
2
C mode only), then enables
the device.
Help
| Help F2
Provides instructions on where to find the latest EV kit data sheet.
| About
Provides software information.