User's Manual

APPLICANT: MOTOROLA, INC. FCC ID: IHDT6AC1

Exhibit 8

3. Pin description & main Functionality

3.1 Standard model & Slim model

The available functionality in these models are the follow:

Data & Voice (D10 Replacement & Slim) - Connections

D15

Main

Process.

Uart #1

RS232 port

User logic

Power supplies

Main PWR

Audio

Data port

EXT_SIM

DSC

General

Data purposes

DSC bus

3.1.1 Function available in the user connector – 36 pin ZIF

• VCC input. 3.0 to 6Vdc

• Full RS232 - 9 pins. TXD, RXD, RTS,CTS,DSR,DTR,DCD,RI

at 5V levels.

• External SIM connections. SIM Clock, SIM reset, SIM I/O,

SIM VCC,SIM PD

• DSC bus. DSC_EN, Downlink, Uplink –

Motorola proprietary us.

• Audio In/Out. Audio out and On/Off in the same

pin, audio in Signal and analog

ground.

• Man_Test line. Used to detect standard Motorola

accessories.

• TS line (mobport). Used to turn on the radio.

• TX_EN line. This line is an indication when

the radio is transmitting.

Note:

1. The Audio Out line is used to send out the detected audio

and as a toggle On/Off pin.