R3110-CBAA-E1T Datasheet R3110-CBAA-E1B, R3110-CBAA-E1T | P10-P12

RHYTHM R3110

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Figure 6. 16 Configurations and their Resistor Values

Table 4. PARAMETER VALUES AND RANGES

Pin Name: LC HC WG/NL WG/NL AGCO

TN−EN X X 0 1 X

Parameter Description:

Low−Cut Filter

Corner Frequency

High−Cut Filter

Corner Frequency

Wideband

Gain

Noise Level AGC−O

Units: Hz Hz dB dB dB

Config # Voltage on pin [mV] Parameter Values

16 (Default) 900 (VREG) 10 8000 0 −25 0

15 870.1 125 7500 −2 −30 −2

14 831.4 160 7100 −4 −35 −4

13 782.2 200 6700 −6 −40 −6

12 725.1 250 6000 −8 −45 −8

11 658.3 315 5600 −10 −50 −10

10 579.2 400 4750 −12 −55 −12

9 493.9 500 4000 −14 −60 −14

8 406.9 630 3350 −16 −65 −16

7 320.8 800 2800 −18 −70 −18

6 241.7 1000 2370 −20 −75 −20

5 174.9 1250 2000 −22 −80 −22

4 117.8 1600 1700 −24 −85 −24

3 68.55 1700 1400 −26 −90 −26

2 29.88 1800 1180 −28 −95 −28

1 0 (GND) 2000 1000 −30 −100 −30

RHYTHM R3110

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Noise Generator for Tinnitus Treatment

R3110 offers a dedicated pin to control the Tinnitus

Treatment noise generation algorithm: TN−EN. This pin has

an internal pull−down resistor to ground (GND), which

disables the algorithm by default. When activated (pulled to

VB), Tinnitus Treatment is generated deploying

amplitude−scaled white noise, depending on adjustments

made via pin WB/NL. When the TN−EN pin is set high

(connected to VB) to enable the tinnitus algorithm, the

WB/NL pin controls the generated noise level (NL) as per

Table 4. The noise is injected into the audio path, as shown

in the block diagram of Figure 1 and the entire audio signal

is shaped using the internal filters controlled by the LC and

HC pins. The VC pin and, consequently the amount of

attenuation that it selects, only affects the audio signal and

not the tinnitus noise level. The tinnitus mode can be used

in conjunction with all three modes (Simples, Advanced and

Telecoil). In this configuration, it will control the tinnitus

noise level instead.

Using the R3110 Solely as a Tinnitus Masker Device:

R3110 can also be used as a tinnitus only device with no

microphones at all, only one receiver. In this configuration

all inputs will be connected to MGND (MIC and TC−IN).

Push Button Support

R3110 supports the use of momentary switches via the

Mode Select (MS) pin (#9). It allows rotating between the

three input modes (Simple, Advanced and Telecoil) as

defined earlier, this in a sequential manner. A momentary

switch needs to connect the MS pin (#9) to the VB pin (#8)

to enable this functionality. R3110 will switch from Simple

to Advanced Mode, then Telecoil, and then back to Simple,

each time the momentary switch is pushed. When this

function is not desired in the end product, the hearing aid, the

MS pin can be left floating.

Acoustic Indicators

In the configurations outlined both in the Telecoil Support

and in the Push Button Support sections, whenever R3110

transitions between modes, the audio path is temporarily

faded−out and an acoustic indicated is played. R3110 has

preconfigured acoustic indicators to notify the user of the

following events:

• Device startup

♦ Four sequential tones with the following audio

frequencies: A4 (440 Hz), F4 (349 Hz), G4

(392 Hz), C4 (262 Hz)

• MS pin: mode switches with momentary push button

♦ Simple mode: one tone at the C5 audio frequency

(523 Hz)

♦ Advanced mode: two sequential tones with

increasing audio frequencies G4 (392 Hz) and C5

(523 Hz), 250 ms duration and 50 ms silence

between the tones.

♦ Telecoil mode: three faded tones with increasing

audio frequencies E4 (330 Hz), G4 (392 Hz) and C5

(523 Hz).

• TC−EN pin : telecoil mode enabled

♦ Four sequential tones with increasing audio

frequencies C4 (262 Hz), E4 (330 Hz), G4 (392 Hz)

and C5 (523 Hz).

• Low battery

♦ Three sequential tones with decreasing audio

frequencies G4 (392 Hz), E4 (330 Hz) and C4

(262 Hz).

All tones exhibit a nominal 32 ms fade−in and fade−out

transition time. The duration of all the tones is 250 ms, and

the silence duration between tones is 50 ms. The level of the

tones is input referred and determined dynamically by

R3110 based on the input signal level as well as the volume

control.

Power Management and Low Battery Warning

As the voltage on the hearing aid battery decreases under

1.1 V, an audible warning signal is given to the user

indicating that the battery life is low. This indicator is

repeated every five minutes until the battery voltage is

further decreased under 0.88 V, at which point the device

shuts down. In addition to this audible warning and before

shut down, the hearing aid applies a sophisticated power

management scheme to ensure proper operation given the

weak battery supply and to maximize the device’s usable

battery life by reducing the gain to stabilize the supply based

on the instantaneous and average supply voltage levels.

Evaluation Environment and Hybrid Jig

The performances of R3110 can be evaluated by using the

hybrid jig evaluation board. As can be seen on Figure 1, a

number of evaluation features have been designed on the

hybrid jig, such as input and output audio connectors, output

amplification circuitry, microphone headers, push buttons,

toggle switches, analog potentiometers, a USB connection

as well as a wealth of other useful features that will allow

easy evaluation of the R3110 hybrid.

Figure 7. Hybrid Jig

RHYTHM R3110

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Aside from this evaluation hardware, a monitoring utility

is available and shown on Figure 2. This basic command line

tool provides an extremely useful mechanism to read

important information out of a R3110 hybrid such that the

current input mode, the state of digital control pins, and the

presence of valid audio in the input channels or the status of

the configuration pins.

Test Mode

Using the R3110 Monitoring Utility, you can put R3110

into Test Mode, which disables adaptive algorithms and can

be useful when running tests that require this configuration.

There is also a secondary mechanism to enter Test Mode

which does not require the use of a computer or the

connection of the I

C pads. When a voltage of greater than

1.5 V is applied to the VB pad during boot, R3110 will enter

Test Mode, even with MS tied to VB (which would normally

enable Advanced Mode). It is recommended to use a voltage

between 1.52 V and 1.57 V if possible. Do not exceed the

maximum supply voltage as described in Table 1.

You can exit Test Mode by restarting R3110 (at nominal

voltage) regardless of how it entered Test Mode.

When comparing results with and without adaptive

algorithms running, you should expect to see some

differences, depending on the test signal used.

NOTE: Test Mode is not necessary in R3110’s Simple

Mode.

Monitoring Utility Batch Files

To make the use of the basic command line tool easier, a

set of batch files is provided which may be excecuted from

within the Windows environment. These files are located on

the R3110 product page at www.onsemi.com. Once you

have downloaded the file, please follow these steps:

1. Download and unzip the files to the

R3110MU\bin\ directory

2. Right click on the batch file name with the

required parameters and save a shortcut to your

desktop

3. Clicking on the desktop shortcut will launch the

R3110 Monitor utility with the correct parameters.

Figure 8. Monitoring Utility

P1-P3 P4-P6 P7-P9 P10-P12 P13-P14

R3110-CBAA-E1T

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Audio DSPs RHYTHM R3110 PRECONF

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R3110-CBAA-E1T

R3110-CBAA-E1T

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