TMS320VC5416
Fixed-Point Digital Signal Processor
www.ti.com
SPRS095O–MARCH 1999–REVISED JANUARY 2005
Table 2-2. Signal Descriptions (continued)
TERMINAL
NAME
I/O(1)
DESCRIPTION
Emulator 1 pin/disable all outputs. When TRST is driven high, EMU1/OFF is used as an interrupt to or from the
emulator system and is defined as input/output by way of IEEE standard 1149.1 scan system. When TRST is
driven low, EMU1/OFF is configured as OFF. The EMU1/OFF signal, when active low, puts all output drivers into
the high-impedance state. Note that OFF is used exclusively for testing and emulation purposes (not for
multiprocessing applications). Therefore, for the OFF condition, the following apply:
TRST = low,
EMU1/OFF(6)
I/O/Z
EMU0 = high
EMU1/OFF = low
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
64K RAM
Dual Access
Program/Data
64K RAM
Single Access
Program
16K Program
ROM
54X cLEAD
MBus
GPIO
RHEA
Bridge
TI BUS
RHEA Bus
McBSP1
XIO
Enhanced XIO
McBSP2
McBSP3
16HPI
16 HPI
xDMA
logic
RHEAbus
TIMER
APLL
JTAG
Clocks
Figure 3-1. TMS320VC5416 Functional Block Diagram
3.1 Memory
The 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
16
Functional Overview
TI [ TEXAS INSTRUMENTS ]
