Logitech Z906

Logitech Z906 Control Library

This 5.1 speaker system comes with a "1000 Watts Peak/500 Watts RMS" power for a rich THX Certified surround sound. With the ability to decode Dolby Digital and DTS encoded soundtracks.

The Logitech Z906 is who has six class D amplifiers included, but you cannot use them if you do not have the console connected.

This information is made to be able to control the unit without the need of the console, using any device with a programmable serial port, especially an arduino :)

Codenamed "Liszt".

Hardware

The main component is a Renesas D2-71583 intelligent digital amplifier and sound processor.

The system requires external firmware to boot the DSP, the EN25F10A serial flash memory has been chosen.

This is the dump data.

DE-15 Console Connector

The communication between the Digital Audio Processor and the console is done through TTL serial communication at 3.3V.

The following table illustrates the pinout.

Pin	Description	Pin	Description
3	GND	6	GND
11	3.3V @ 250mA	12	TX
13	RX	15	Console Enable

D2-71583 NO is 5V tolerant. If you have Arduino UNO, MEGA, etc use a Logic Level Converter.

Serial settings
Baud rate	57600
Data	8 bit
Parity	Odd
Stop	1 bit

Here is the DE-15 male as viewed from the front of the Main Board.

Enable Console

Connect pin 15 to GND.

Basic Usage

Instantiate a Z906 object and attach to Serial1, you may create multiple Z906 objects.

Z906 LOGI(Serial1)

cmd method uses single or double argument, check next tables.

LOGI.cmd(arg)
LOGI.cmd(arg_a, arg_b)

Examples :

LOGI.cmd(MUTE_ON)         // Enable Mute
LOGI.cmd(MAIN_LEVEL, 15)  // Set Main Level to 15

Request data

LOGI.request(MAIN_LEVEL)    // return current Main Level
LOGI.request(REAR_LEVEL)    // return current Rear Level
LOGI.request(CENTER_LEVEL)  // return current Center Level
LOGI.request(SUB_LEVEL)     // return current Subwoofer Level

LOGI.request(STATUS_STBY)   // return stand-by status
LOGI.request(VERSION)       // return firmware version

Single argument command

argument	description
SELECT_INPUT_1	Enable TRS 5.1 input
SELECT_INPUT_2	Enable RCA 2.0 input
SELECT_INPUT_3	Enable Optical 1 input
SELECT_INPUT_4	Enable Optical 2 input
SELECT_INPUT_5	Enable Coaxial input
SELECT_INPUT_AUX	Enable TRS 2.0 (console) input
LEVEL_MAIN_UP	Increase Main Level by one unit
LEVEL_MAIN_DOWN	Decrease Main Level by one unit
LEVEL_SUB_UP	Increase Subwoofer Level by one unit
LEVEL_SUB_DOWN	Decrease Subwoofer Level by one unit
LEVEL_CENTER_UP	Increase Center Level by one unit
LEVEL_CENTER_DOWN	Decrease Subwoofer Level by one unit
LEVEL_REAR_UP	Increase Rear Level by one unit
LEVEL_REAR_DOWN	Decrease Rear Level by one unit
PWM_OFF	PWM Generator OFF
PWM_ON	PWM Generator ON
SELECT_EFFECT_3D	Enable 3D Effect in current input
SELECT_EFFECT_41	Enable 4.1 Effect in current input
SELECT_EFFECT_21	Enable 2.1 Effect in current input
SELECT_EFFECT_NO	Disable all Effects in current input
BLOCK_INPUTS	Disable signal input
NO_BLOCK_INPUTS	Enable signal input
RESET_PWR_UP_TIME	Reset Power-Up Timer
EEPROM_SAVE	Save current settings to EEPROM
MUTE_ON	Enable Mute
MUTE_OFF	Disable Mute

Double argument command

argument a	argument b	description
MAIN_LEVEL	0-255	Set Main Level to argument b value
REAR_LEVEL	0-255	Set Rear Level to argument b value
CENTER_LEVEL	0-255	Set Center Level to argument b value
SUB_LEVEL	0-255	Set Sub Level to argument b value

EEPROM

Use the EEPROM_SAVE function with caution. Each EEPROM has a limited number of write cycles (~100,000) per address. If you write excessively to the EEPROM, you will reduce the lifespan.

Get Temperature

return the value of main temperature sensor.

LOGI.main_sensor()

Turn the amplifier on or off

Turns the amplifier on or off. When turning off, the amplifier will also store the current state of the unit in EEPROM. Note, that the amplifier still draws a certain amount of power and will only fully turn off, if you also open the connection between pin15 and GND on the DSUB connector.

LOGI.on()
LOGI.off()

Change input

Changes the input and applies the input effect. If no input effect is selected, the device's factory defaults will be used.

LOGI.input(input, effect)

Basic Example

#include <Z906.h>

// Instantiate a Z906 object and Attach to Serial1
Z906 LOGI(Serial1);

void setup(){

Serial.begin(9600);
while(!Serial);

while(LOGI.request(VERSION) == 0)
{
  Serial.println("Waiting Z906 Power-Up");
  delay(1000);
}

Serial.println("Z906 Version : " + (String) LOGI.request(VERSION));

// Power ON the amplifier
LOGI.on();

// Select RCA 2.0 Input
LOGI.input(SELECT_INPUT_2);

// Disable Mute
LOGI.cmd(MUTE_OFF);

// Set Main Level to 15;
LOGI.cmd(MAIN_LEVEL, 15);
}

void loop(){

Serial.println("Temperature main sensor: " + (String) LOGI.main_sensor());

delay(1000);
}

Use with Docklight

Docklight is a testing, analysis and simulation tool for serial communication protocols.

Use the following project to use Z906 unit connected to a PC.

Z906.ptp

YouTube