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Hardware
At the heart of an MSC711x DSP device is the StarCore? SC1400 core, providing the processing power
for intensive numeric processing. The four ALUs in the SC1400 core work together to deliver 800 million
multiply and add commands per second (MMACS) performance with an internal 200 MHz clock at 1.2 V.
An extended core services the SC1400 bandwidth requirements, with high speed zero wait state memory
elements for both program and data accesses. In the extended core are a multi-ported 64 or 192 Kbyte level
1 internal memory (M1) for both high speed program and data storage. A 16 Kbyte, 16-way instruction
cache (ICache) provides an instruction stream to the core with no wait states on cache hits. The efficiency
of the ICache is greatly enhanced by an intelligent fetch unit with advanced features for real-time
processing. A 4-entry write buffer allows the SC1400 core to continue processing while the write buffer
writes to locations outside the platform. A 192 Kbyte level 2 memory (M2) is also available on some
MSC711x family devices for bursting to the ICache and for accesses from the extended core.
PDK J2
MDS J9
MDS J7
PDK J3
PDK J1
MDS J8
PDS J6
PDK J5
Ethernet
Switch
SWITCHING
DDR
SRAM
711x
711x
DDR
SRAM
BUFFER
CPLD
DC-DC
DDR
SRAM
711x
711x
DDR
SRAM
SIDE 1
SIDE 2
J10
Side 1
DC-DC
Side 2
Figure 7. Major Components of the SPT711xPFCE
Each device in the MSC711x family is designed for optimal data flow to/from the SC1400 core. Wide
full-speed buses exactly match the busing requirements of the SC1400 core. Data is transferred to the DSP
from either the external memory interface, the Ethernet controller on some devices, the host interface, or
the TDM serial interfaces. The flexible DMA controller transfers data through the bus switch from any of
these ports to buffers in the internal memories. The SC1400 cores and other modules interconnect via a
crossbar switch that manages rapid data transfer and storage between the MSC711x device, its internal
components, and external devices. This multi-port crossbar switch allows multiple data transfers to occur
MSC711x Packet Telephony Farm Card (SPT711xPFCE), Rev. 1
Freescale Semiconductor
9
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