Model
MASS 2
Version
V_1.0
Prepared by
H/W
Date
22/01/2008
Subject Technical
Manual Page
34/59
Baseband Parallel Interface
The Baseband Parallel Interface features a 10-pin output bus used for timing-critical control of the external circuits. These pins
are typically used to control front-end components at the specified time along the GSM time-base, such as transmit-
enable(PA_EN), band switching(BANDSW_DCS), FEM-switch(LB_TX, HB_TX), etc.
The following table is shown the used pin for RF part.
Pin Name
Pin Description
Description
Component
BPI_BUS 0
HB_TX
Switch Module DCS/PCS TX
Switch Module(LMSP54HA)
BPI_BUS 1
LB_TX
Switch Module GSM TX
Switch Module(LMSP54HA)
BPI_BUS 2
PCS
Switch Module PCS RX
Switch Module(LMSP54HA)
BPI_BUS 4
PA_EN
PAM Enable
PAM (RF3166)
BPI_BUS 5
BANDSW_DCS
Band switch for DCS
PAM (RF3166)
BPI_BUS 8
BT_LDO_EN
Blue Tooth Power Supply Enable
BTM(MT6601)
BPI_BUS 9
RFVCOEN
RF VCO Enable
Transceiver(MT6120)
Figure 36. BSI and BPI Circuit diagram.
Automatic Power Control Unit
Automatic Power Control unit is used to control the Power Amplifier module. Through APC unit, we can set the proper
transmit power level of the handset and to ensure that the burst power ramping requirements are met. In one TDMA frame, up
to 7 TDMA events can be enabled to support multi-slot transmission. In practice, 5 banks of ramp profiles are used in one
frame to make up 4 consecutive transmission slots.
The shape and magnitude of the ramp profiles are configurable to fit ramp-up, intermediate ramp, and ramp-down profiles.
Each bank of the ramp profile consists of 16 8-bit unsigned values, which is adjustable for different conditions.
Summary of Contents for MASS2
Page 20: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 9 11 ...
Page 31: ...Model MASS 2 Version V_1 0 Prepared by H W Date 22 01 2008 Subject Technical Manual Page 9 59 ...
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