TMS320C80GF datasheet(154/171 Pages) TI

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TMS320C80

DIGITAL SIGNAL PROCESSOR

SPRS023B – JULY 1994 – REVISED OCTOBER 1997

151

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

data input timing

The following general timing parameters apply to the D[63:0] inputs unless otherwise specifically given. The

value

n as used in the parameters represents the integral number of half cycles between the transitions of the

output and input in question (see Figure 125).

PARAMETER

’C80-40

’C80-50

’C80-60

UNIT

NO.

PARAMETER

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

ta(CKOH-DV)

Access time, CLKOUT high to D[63:0]

valid

ntH–8

ntH–5.3

ntH–4.0

ta(CKOL-DV)

Access time, CLKOUT low to D[63:0]

valid

ntH–8

ntH–6.5

tsu(DV-CKOH)

Setup time, D[63:0] valid to CLKOUT no

longer low

6.1

tsu(DV-CKOL)

Setup time, D[63:0] valid to CLKOUT no

longer high

6.1

th(CKOL-DV)

Hold time, D[63:0] valid after CLKOUT

low

th(CKOH-DV)

Hold time, D[63:0] valid after CLKOUT

high

ta(OUTV-DV)

Access time, output valid to D[63:0]

inputs valid

A[31:0], CAS/DQM[7:0]†, STATUS[5:0]

DBEN, DDIN, DSF, RAS, RL,

TRG/CAS, W

ntH–9

ntH–8

ntH–7

ntH–6.5

ntH–7

ntH–6.5

th(OUTV-DV)‡

Hold time, D[63:0] valid after output valid

RAS, CAS/DQM[7:0]

A[31:0]

† Except CAS/DQM[7:0] during non user-timed 2 cycle/column accesses

‡ Applies to RAS, CAS/DQM[7:0], and A[31:0] transitions that occur on CLKOUT edge coincident with input data sampling

CLKOUT

D[63:0]

Output

Figure 125. Data-Input Timing

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