TMS320C44 datasheet(5/42 Pages) TI

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TMS320C44

DIGITAL SIGNAL PROCESSOR

SPRS031B – AUGUST 1994 – REVISED DECEMBER 1995

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

Pin Functions (Continued)

SIGNAL NAME

NO. OF

PINS

TYPE†

DESCRIPTION

COMMUNICATION PORT 1 INTERFACE (13 pins)

C1D7 – C1D0

I/O

Communication port 1 data bus

CREQ1

I/O

Communication port 1 token-request signal

CACK1

I/O

Communication port 1 token-request-acknowledge signal

CSTRB1

I/O

Communication port 1 data-strobe signal

CRDY1

I/O

Communication port 1 data-ready signal

CDIR1

Communication port 1 direction signal

COMMUNICATION PORT 2 INTERFACE (13 pins)

C2D7 – C2D0

I/O

Communication port 2 data bus

CREQ2

I/O

Communication port 2 token-request signal

CACK2

I/O

Communication port 2 token-request-acknowledge signal

CSTRB2

I/O

Communication port 2 data-strobe signal

CRDY2

I/O

Communication port 2 data-ready signal

CDIR2

Communication port 2 direction signal

COMMUNICATION PORT 4 INTERFACE (13 pins)

C4D7 – C4D0

I/O

Communication port 4 data bus

CREQ4

I/O

Communication port 4 token-request signal

CACK4

I/O

Communication port 4 token-request-acknowledge signal

CSTRB4

I/O

Communication port 4 data-strobe signal

CRDY4

I/O

Communication port 4 data-ready signal

CDIR4

Communication port 4 direction signal

COMMUNICATION PORT 5 INTERFACE (13 pins)

C5D7 – C5D0

I/O

Communication port 5 data bus

CREQ5

I/O

Communication port 5 token-request signal

CACK5

I/O

Communication port 5 token-request-acknowledge signal

CSTRB5

I/O

Communication port 5 data-strobe signal

CRDY5

I/O

Communication port 5 data-ready signal

CDIR5

Communication port 5 direction signal

INTERRUPTS, I / O FLAGS, RESET, TIMER (12 pins)

IIOF3 – IIOF0

I/O

Interrupt and I / O flags

NMI

Nonmaskable interrupt. NMI is sensitive to a low-going edge.

IACK

Interrupt acknowledge

RESET

Reset signal

RESETLOC1

RESETLOC0

Reset-vector location

ROMEN

On-chip ROM enable (0 = disable, 1 = enable)

TCLK0

I/O

Timer 0

TCLK1

I/O

Timer 1

† I = input, O = output, Z = high impedance

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