FEDL7041-05

ML7041

5/28

PIN AND FUNCTIONAL DESCRIPTIONS

MIC1I, MIC1O, MIC2I, MIC2O, MIC3–, MIC3+, MIC3–

Transmit analog inputs and outputs for transmit gain adjustment. Gains of input levels of the pins can be adjusted

using external resisters.

MIC1I, MIC2I, and MIC3– are connected to the inverting inputs of the internal transmit amplifiers. MIC3+ is

connected to the non-inverting input of the internal transmit amplifier 3. MIC1O, MIC2O, and MIC3O are

connected to the internal transmit amplifier outputs. Analog input signals are controlled by the control register

(CR1-B7, B6). Also, the amplifiers that are not being selected are deactivated and their outputs are put into high

impedance state.

Refer to Figure 1 for gain adjustment.

EAR1O, EAR2O, EXTO, EXTI, SPO–, SPO+

Receive analog outputs and inputs for receive gain adjustment. EAR1O, EAR2O, and EXTO are the receive filter

outputs. EAR1O and EAR2O can directly drive a 32

 load.

SPO+ and SPO– are differential analog signal outputs which can directly drive an 8

 load. The receive side

signal outputs can be selected by CR1-B5 and CR1-B4. If the amplifiers connected to EAR1O and EAR2O are not

being selected, the amplifiers are deactivated and their outputs are put into high impedance state. Gains of output

levels of the pins can be adjusted using the external resistors. The power control is accomplished by CR0-B6.

Refer to Figure 1.