Motorola Confidential Proprietary
Theory of OperationService Manual(Level 3)
3-13
Draft 1.0
RF Interface
Harmony
The Harmony IC is a mixed-signal transceiver backend
IC intended to support GSM, EDGE and WCDMA
services. It includes 2 receive paths: a medium-band
path and a wideband path. The medium-band path is
intended for GSM and EDGE and is configured to sup-
port VLIF receiver architecture. The wideband path is
intended for WCDMA and is designed to operate in a
direct conversion receiver architecture. Both of these
receive signal paths are optimized for non-compressed
mode. The transmitter path is designed to operate in a
direct-launch transmitter architecture. The IC also in-
cludes dual clock synthesizers, as well as general sup-
port circuit such as sequence manager and SPI.
The Harmony IC and Base-Band (POG) IC interface
consists of two independent sets of SPI lines (WB I/F,
MB I/F); 2 chip-enable inputs, 2 clock inputs, 2 data
inputs, and 2 data outputs. Harmony interfaces to the
Base-band IC as a slave IC, however, it is also a mas-
ter to two auxiliary ICs (Algae MB and Rattler) using
two independent sets of SPI lines (TX AUX, RX AUX).
The two auxiliary ICs are programmed by the Base-
Band via Harmony.
In order to decrease the overall area required for con-
trolling the sequences, a sequential access strategy was
developed. The sequence manager would consist of
controllers that would access an SRAM device sequen-
tially. These controllers run of a set of programs that are
pre loaded in to an SRAM memory device. In order to
eliminate the need for a stack and interrupts each con-
troller is dedicated to a single task. In the sequence
manager there exists a controller per task, where the
number of maximum tasks would be equivalent to the
number of input TIMER lines.
A serial bus consisting of SDFS and SDRX will trans-
mit the GSM RXI and RXQ data in 2’s complement
format to the Serial BBP module. The RXI and RXQ
data will then be handled by the DSP integrated in the
Figure 3-16. RF Interface Block Diagram
GSM
PA
WCDMA
PA
FEM
ALGAE
MB
Rattler
ONELife
Temp
Sensor
PrimSyn
WB I/F
MB I/F
Sequence
Manager
G
P
I
O
RX Aux SPI
TX Aux SPI
S ystem
Clocks
Serial
BBP
Parallel
BB P
Sequence Mgr
Triggers
SPI
Harmony
(U100)
POG
(U1000)
CKIH
Serial
BB P
Parallel
BBP
L1T_1/2
MQ SP I
RF Interface
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