User's Manual

VS500 USER MANUAL
Confidential & Proprietary of VACOM 7/13 Page Date : 05-08-08, Rev No : 1.0
Control No.: MSD351A0VS500
Originated by Hard Ware 3 Team
UART2. UART1 is used for test and debugging and user-defined download program.
f. JTAG (Joint Test Action Group) Interface: It is used for board test and debugging with Boundary
Scan. And it can be used as S/W Upgrade by S/W Downloading function.
g. RF Transmit Interface: It controls Tx RF Signal and output power through providing differential
Base band I/Q Signals and TX_AGC_ADJ signal.
Transmit power strength is controlled by TX_AGC_ADJ which is result of RF calibration in
RFT6122.
RF Receive Interface : It manages received RX_IM, RX_QM, RX_IP, RX_QP signals from
RFR6122
h. Serial Bus Interface: It controls the action of RFR6122, RFT6122 and PM6610 using serial bus
interface protocol.
i. Others
A. Reference Oscillator Tracking: Compensates error of VCTCXO frequency with
TRK_LO_ADJ signal.
B. ADCs : There are seven 8bit House-Keeping ADCs which can be used for user-defined
functions.
In this model, we use MSM embedded ADCs for earphone detection, earphone send/end
function, RF Tx Power detection, temperature check, voltage and current of PM6610 check
C. GPIOs : There are totally 50 General Purpose Input/Output ports as interrupt sources
But many of these have alternative inherent functions, so we use a part of these as user-defined
function.
3.2.1.2 AUDIO PART
Audio part is composed of transmit/receive phonetic treatment part .
3.2.1.2.1 TX AUDIO PATH
The microphone interface consists of two differential microphone inputs, one differential auxiliary input.
Each has a two-stage gain programmable amplifier. And there are two optional digital filters on Tx path
prior to the vocoder, a slope filter and a high-pass filter which has a user programmable frequency
response.
3.2.1.2.2 RX AUDIO PATH
The Receive path can be directed to one of two earphone amplifiers or the auxiliary output. Their gain
and path can be controlled by software. And it has user selectable high-pass filter, 2’s complement FIR
filter after the amplifier.