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參數(shù)資料
| 型號： | TMS320UVC5409 |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | 16-Bit Digital Signal Processor |
| 中文描述： | 16位數(shù)字信號處理器 |
| 文件頁數(shù)： | 6/60頁 |
| 文件大?。?/td> | 772K |
| 代理商： | TMS320UVC5409 |
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TMS320UVC5402
FIXED-POINT DIGITAL SIGNAL PROCESSOR
SPRS100A – APRIL 1999 – REVISED AUGUST 1999
6
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
Terminal Functions (Continued)
NAME
DESCRIPTION
TYPE
TERMINAL
INITIALIZATION, INTERRUPT, AND RESET OPERATIONS (CONTINUED)
MP/MC
I
Microprocessor/microcomputer mode select. If active low at reset, microcomputer mode is selected, and the
internal program ROM is mapped into the upper 4K words of program memory space. If the pin is driven high
during reset, microprocessor mode is selected, and the on-chip ROM is removed from program space. This pin
is only sampled at reset, and the MP/MC bit of the processor mode status (PMST) register can override the mode
that is selected at reset.
MULTIPROCESSING SIGNALS
BIO
I
Branch control. A branch can be conditionally executed when BIO is active. If low, the processor executes the
conditional instruction. For the XC instruction, the BIO condition is sampled during the decode phase of the
pipeline; all other instructions sample BIO during the read phase of the pipeline.
XF
O/Z
External flag output (latched software-programmable signal). XF is set high by the SSBX XF instruction, set low
by the RSBX XF instruction or by loading ST1. XF is used for signaling other processors in multiprocessor
configurations or used as a general-purpose output pin. XF goes into the high-impedance state when
EMU1/OFF is low, and is set high at reset.
MEMORY CONTROL SIGNALS
DS
PS
IS
O/Z
Data, program, and I/O space select signals. DS, PS, and IS are always high unless driven low for accessing
a particular external memory space. Active period corresponds to valid address information. DS, PS, and IS are
placed into the high-impedance state in the hold mode; the signals also go into the high-impedance state when
EMU1/OFF is low.
MSTRB
O/Z
Memory strobe signal. MSTRB is always high unless low-level asserted to indicate an external bus access to
data or program memory. MSTRB is placed in the high-impedance state in the hold mode; it also goes into the
high-impedance state when EMU1/OFF is low.
READY
I
Data ready. READY indicates that an external device is prepared for a bus transaction to be completed. If the
device is not ready (READY is low), the processor waits one cycle and checks READY again. Note that the
processor performs ready detection if at least two software wait states are programmed. The READY signal is
not sampled until the completion of the software wait states.
R/W
O/Z
Read/write signal. R/W indicates transfer direction during communication to an external device. R/W is normally
in the read mode (high), unless it is asserted low when the DSP performs a write operation. R/W is placed in
the high-impedance state in hold mode; it also goes into the high-impedance state when EMU1/OFF is low.
IOSTRB
O/Z
I/O strobe signal. IOSTRB is always high unless low-level asserted to indicate an external bus access to an I/O
device. IOSTRB is placed in the high-impedance state in the hold mode; it also goes into the high-impedance
state when EMU1/OFF is low.
HOLD
I
Hold. HOLD is asserted to request control of the address, data, and control lines. When acknowledged by the
’C54x, these lines go into the high-impedance state.
HOLDA
O/Z
Hold acknowledge. HOLDA indicates that the ’UVC5402 is in a hold state and that the address, data, and control
lines are in the high-impedance state, allowing the external memory interface to be accessed by other devices.
HOLDA also goes into the high-impedance state when EMU1/OFF is low.
MSC
O/Z
Microstate complete. MSC indicates completion of all software wait states. When two or more software wait
states are enabled, the MSC pin goes active at the beginning of the first software wait state and goes inactive
high at the beginning of the last software wait state. If connected to the READY input, MSC forces one external
wait state after the last internal wait state is completed. MSC also goes into the high-impedance state when
EMU1/OFF is low.
IAQ
O/Z
Instruction acquisition signal. IAQ is asserted (active low) when there is an instruction address on the address
bus. IAQ goes into the high-impedance state when EMU1/OFF is low.
CLOCK/TIMER SIGNALS
CLKOUT
O/Z
Master clock output signal. CLKOUT cycles at the machine-cycle rate of the CPU. The internal machine cycle
is bounded by the rising edges of this signal. CLKOUT also goes into the high-impedance state when EMU1/OFF
is low.
I = input, O = output, Z = high impedance, S = supply
P
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