Motorola ATS 3000

6816985H01-F February 14, 2012
700/800 MHz Detailed Theories of Operation: VOCON Functional Blocks 4.4-19
Figure 4.4-5. VOCON Receive Audio Path
ABACUS III
U401
RX_SSI_FSYNC
RX_SSI_CLK
RX_SSI_DATA
Patriot SPIB
Patriot SAP/BBP
MAKO_CS
SPI_MISOB
CODEC_RX
CODEC_DCLK
CODEC_FSYNC
VC_OUT_P
VC_OUT_M
PA_IN_M
PA_IN_P
SPI_MOSIB
SCKB
HP & LP
Filter = 22kHz,
200Hz
PA
Control
Digital
LPF = 3.4kHz
CODEC
16-Bit
D/A
G4
Preamp =
0 to 10
dB
G1 Digital
Gain = 0 or
1 dB
G3
Attenuator
= -52 to 0
dB
G5
EXT PA
=26 dB
G6
INT PA
=26 dB
MAKO IC U701
Internal
Speaker =
28 ohms
External
Speaker
3
4
3