SMJ320VC5416 Datasheet, PDF (20/92 Pages) Texas Instruments – Fixed-Point Digital Signal Processor

Functional Overview
3 Functional Overview
The following functional overview is based on the block diagram in Figure 3–1.
P, C, D, E Buses and Control Signals
54X cLEAD
64K RAM
Single Access
Program
64K RAM
Dual Access
Program/Data
MBus
TI BUS
RHEA
Bridge
RHEA Bus
16K Program
ROM
GPIO
McBSP1
XIO
Enhanced XIO
McBSP2
McBSP3
16HPI
16 HPI
xDMA
logic
RHEAbus
TIMER
APLL
Clocks
JTAG
Figure 3–1. SMJ320VC5416 Functional Block Diagram
3.1 Memory
The 5416 device provides both on-chip ROM and RAM memories to aid in system performance and
integration.
3.1.1 Data Memory
The data memory space addresses up to 64K of 16-bit words. The device automatically accesses the on-chip
RAM when addressing within its bounds. When an address is generated outside the RAM bounds, the device
automatically generates an external access.
The advantages of operating from on-chip memory are as follows:
• Higher performance because no wait states are required
• Higher performance because of better flow within the pipeline of the central arithmetic logic unit (CALU)
• Lower cost than external memory
• Lower power than external memory
The advantage of operating from off-chip memory is the ability to access a larger address space.
10 SGUS035A
April 2003 – Revised July 2003