TMS320C80GF datasheet(144/171 Pages) TI

144 / 171 page

TMS320C80

DIGITAL SIGNAL PROCESSOR

SPRS023B – JULY 1994 – REVISED OCTOBER 1997

141

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

PARAMETER MEASUREMENT INFORMATION

timing parameter symbology

Timing parameter symbols used herein were created in accordance with JEDEC Standard 100-A. In order to

shorten the symbols, some of the pin names and other related terminology have been abbreviated as follows:

A[31 : 0]

RDY

READY

CAS

CAS / DQM[7 : 0]

RST

RESET

CFG

AS[2:0], BS[1:0], CT[2:0], PS[3:0], UTIME

RTY

RETRY

CKI

CLKIN

REQ

REQ[1:0]

CKO

CLKOUT

CMP

RETRY, READY, FAULT

READY, RETRY

D[63:0]

SCK

SCLK0, SCLK1

EIN

EINT1, EINT2, EINT3, or EINTx

TCK

EMU

EMU0, EMU1

TDI

FCK

FCLK0, FCLK1

TDO

HAK

HACK

TMS

HRQ

HREQ

TRS

TRST

LIN

LINT4

UTM

UTIME

MID

A[31:0], STATUS[5:0]

HSYNC0, VSYNC0, CSYNC0, HSYNC1, VSYNC1,

or CSYNC1

OUT

A[31:0], CAS / DQM[7 : 0], D[63:0], DBEN, DDIN,

DSF, RAS, RL, STATUS[5:0], TRG / CAS, W

HSYNC0, VSYNC0, CSYNC0 / HBLNK0,

CBLNK0 / VBLNK0, HSYNC1, VSYNC1,

CSYNC1 / HBLNK1, CBLNK1 / VBLNK1, CAREA0,

or CAREA1

RAS

XPT

XPT[2:0] OR XPTx

Lowercase subscripts and their meanings are:

The following letters and symbols and their meanings are:

access time

High

cycle time (period)

Low

delay time

Valid

hold time

High impedance

setup time

Unknown, changing, or don’t care level

transition time

pulse duration (width)

general notes on timing parameters

The period of the output clock (CLKOUT) is twice the period of the input clock (CLKIN), or 2

× tc(CKI). The half

cycle time (tH) that appears in the following tables is one-half of the output clock period, or equal to the input

clock period, tc(CKI).

All output signals from the ’C80 (including CLKOUT) are derived from an internal clock such that all output

transitions for a given half cycle occur with a minimum of skewing relative to each other.

The signal combinations shown in the following timing diagrams may not necessarily represent actual cycles.

For actual cycle examples, refer to the appropriate cycle description section of this data sheet.

TMS320C80GF Datasheet(PDF) 144 Page - Texas Instruments

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