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TMS320LC56 Datasheet(PDF) 4 Page - Texas Instruments

Part # TMS320LC56
Description  DIGITAL SIGNAL PROCESSORS
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

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TMS320C5x, TMS320LC5x
DIGITAL SIGNAL PROCESSORS
SPRS030A – APRIL 1995 – REVISED APRIL 1996
4
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
Pin Functions for Devices in the PQ Package
SIGNAL
TYPE
DESCRIPTION
PARALLEL INTERFACE BUS
A0 – A15
I/O/Z
16-bit external address bus (MSB: A15, LSB: A0)
D0 – D15
I/O/Z
16-bit external data bus (MSB: D15, LSB: D0)
PS, DS, IS
O/Z
Program, data, and I /O space select outputs, respectively
STRB
I/O/Z
Timing strobe for external cycles and external DMA
R/W
I/O/Z
Read / write select for external cycles and external DMA
RD, WE
O/Z
Read and write strobes, respectively, for external cycles
READY
I
External bus ready/ wait-state control input
BR
I/O/Z
Bus request. Arbitrates global memory and external DMA
SYSTEM INTERFACE / CONTROL SIGNALS
RS
I
Reset. Initializes device and sets PC to zero
MP/ MC
I
Microprocessor/microcomputer mode select. Enables internal ROM
HOLD
I
Puts parallel I/ F bus in high-impedance state after current cycle
HOLDA
O/Z
Hold acknowledge. Indicates external bus in hold state
XF
O/Z
External flag output. Set /cleared through software
BIO
I
I /O branch input. Implements conditional branches
TOUT
O/Z
Timer output signal. Indicates output of internal timer
IAQ
O/Z
Instruction acquisition signal
IACK
O/Z
Interrupt acknowledge signal
INT1 – INT4
I
External interrupt inputs
NMI
I
Nonmaskable external interrupt
SERIAL PORT INTERFACE (SPI)
DR
I
Serial receive-data input
DX
O/Z
Serial transmit-data output. In high-impedance state when not transmitting
CLKR
I
Serial receive-data clock input
CLKX
I/O/Z
Serial transmit-data clock. Internal or external source
FSR
I
Serial receive-frame-synchronization input
FSX
I/O/Z
Serial transmit-frame-synchronization signal. Internal or external source
TDM SERIAL-PORT INTERFACE
TDR
I
TDM serial receive-data input
TDX
O/Z
TDM serial transmit-data output. In high-impedance state when not transmitting
TCLKR
I
TDM serial receive-data clock input
TCLKX
I/O/Z
TDM serial transmit-data clock. Internal or external source
TFSR / TADD
I/O/Z
TDM serial receive-frame-synchronization input. In the TDM mode, TFSR / TADD is used to output /
input the address of the port.
TFSX / TFRM
I
TDM serial transmit-frame-synchronization signal. Internal or external source. In the TDM mode,
TFSX / TFRM becomes TFRM, the TDM frame synchronization.
LEGEND:
I = Input
O = Output
Z = High impedance


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