Motorola APX 7000 Detailed Service Manual page 88

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Table of Contents

RF Interface

The VOCON to RF board interface through connector J1001. See

The major interfaces are the TX and RX SSI buses, the SPI Bus with associated chip selects, the

synchronization signals (DMCS,SYNCB), the 16.8 MHz clock, MAKO VDDs and I/O's, and the

TX Inhibit from the Bluetooth Option Board.

3.2.7.1 TX SSI

The TX SSI interface provides the SSI data from the OMAP's DSP to the Trident IC on the RF board.

The interface contains 3 signals, the TX frame sync, TX clock, and TX Data signals. The pin

numbers for both the RF connector and OMAP IC are also shown in

3.2.7.2 RX SSI

The RX SSI interface provides the SSI data from the Abacus IC on the RF board to the OMAP's

DSP. The interface contains 3 signals, the RX frame sync, RX clock, and RX Data signals. The pin

numbers for both the RF connector and OMAP IC are shown in

3.2.7.3 Synchronization

The DMCS and SYNCB signals are used for synchronization between the RF and VOCON boards.

These signals route from the OMAP IC timer outputs through the CPLD to the RF board. The DMCS

signal connects to the Trident IC and the SYNCB connects to the ABACUS IC. The pin numbers for

both of the signals are shown in

1,4,5,10,24,

Figure 3-53. VOCON to RF Board Interface

N14,P14,AA17

GPIO61/SPIF_CS2

TIMER.EXTCLK

ONE_WIRE_BATT

Theory of Operation

OPTION BOARD

: Controller

Troubleshooting