Motorola APX 7000 Detailed Service Manual page 69

Theory of Operation
: Controller
3.2.4.10 Peripheral Devices
The OMAP processor is equipped with multiple buses and interfaces that are configured for
peripheral interconnection.
3.2.4.10.1 Receive and Transmit SSI
These two interfaces are dedicated for communicating with the RF deck digital interface, carrying
receive and transmit base band signals. The OMAP processor generates the clock and FSYNC
signals on this bus.
RF BOARD
RX_FSYNC
RX_CLK
ABACUS
RX_DA
TX_FSYNC
TX_CLK
TRIDENT
TX_DA
3.2.4.10.2 Audio SSI
OMAP's McBSP1 interface is configured as a SSI interface dedicated to carry transmit and receive
audio data to peripheral devices. The peripherals connected to this bus include MAKO, Audio
CODEC, MACE and CPLD. The bus also connects to the bluetooth option board via J3001. OMAP
generates the clock and frame sync signals for this bus.
Audio SSI Data -
Diagram 2
RX SSI
McBSP 2
3
OMAP 1710
TX SSI
McBSP 2
3
MAKO
Figure 3-34. RX / TX SSI Configuration
SSI1
rxd
53
RED TX
RD1
SSC1
TD1
(Red)
NC7SP08
CODECs
RED RX
Figure 3-35. Audio SSI Configuration
VOCON BOARD
SYNC
McBSP 1
BCLK
VC_FSYNC
VC_DCLK
Option Board
(type1 option)
SSI0 SSI1 SSI0
txd txd rxd
51 49 47
JU JU
SSC2
MACE
(Sniffer)
SSC0
PA28(GPIO) (Black)
TD3 Hi_Sec*/Normal
0
0
1
1
CPLD
MCLK
WCLK
MACE/CODEC
FSYNC
MACE/
CODEC_CLK
CPLD
OPT FSYNC
OPT_CLK
RD2
RD0
BLACK RX
BLACK TX
OMAP
3-45
TI
CODEC
MACE
OPTION
BOARD