Hytera PD502, Service Manual, Page: 22 / 136

VHF (136-174 MHz) Circuit Description
16
MCBSP
OMAP5912 provides 3 MCBSP interfaces: MCBSP1, MCBSP2 and MCBSP3. MCBSP1 is connected to
the I
2
S interface of the audio codec, to realize two-way transmission of digital voice and data. MCBSP2
uses independent clock and frame synchronization for transmission and reception. AD9864 SSI is
connected to the RX end of OMAP5912 MCBSP2. AD9864 works in master mode, while DSP works in
slave mode. DAC is connected to the TX end of MCBSP2, and DSP works in master mode. MCBSP3 is
connected to the interface for option board. The connection of MCBSP is shown below.
MCBSP3.FSX (P18)
MCBSP3.DX (W14)
MCBSP3.DR (AA17)
MCBSP2.CLKX (Y6)
MCBSP2.FSX (W7)
CODEC
IIS_WCLK
IIS_BCLK
IIS_DO
IIS_DI
MCBSP1.CLKX(G21)
MCBSP1.FSX(H15)
MCBSP1.DR (H20)
MCBSP1.DX(H18)
MCBSP2.DX (P10)
AD9864
FS
DOUT
CLKOUT
CLK
FSX
DIN
TLV5614 MCBSP2.CLKR (V7)
MCBSP2.FSR (W6)
MCBSP2.DR (AA5)
MCBSP3.CLKX(P14)
USB
OMAP5912 provides three USB interfaces, one of which integrates USB transceiver. The integrated
USB transceiver is connected to the accessory connector, and is used for programme downloading and
SPIF.CS2(T19)
SPIF.SCK(U19)
SPIF.DOUT(W21)
SPIF.CS1 (U18)
OMAP5912
CS
AD9864 CLK
DO
DIN