TMSC6701 datasheet(29/64 Pages) TI

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TMS320C6701

FLOATINGPOINT DIGITAL SIGNAL PROCESSOR

SPRS067E – MAY 1998 – REVISED MAY 2000

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

INPUT AND OUTPUT CLOCKS

timing requirements for CLKIN (’C6701-150, -167 devices only)†‡ (see Figure 8)

’C6701-150

’C6701-167

NO.

CLKMODE = x4

CLKMODE = x1

CLKMODE = x4

CLKMODE = x1

UNIT

NO.

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tc(CLKIN)

Cycle time, CLKIN

26.7

6.7

tw(CLKINH)

Pulse duration,

CLKIN high

0.4C

0.45C

0.4C

0.45C

tw(CLKINL)

Pulse duration,

CLKIN low

0.4C

0.45C

0.4C

0.45C

tt(CLKIN)

Transition time, CLKIN

0.6

† The reference points for the rise and fall transitions are measured at 20% and 80%, respectively, of VIH.

‡ C = CLKIN cycle time in ns. For example, when CLKIN frequency is 10 MHz, use C = 100 ns.

timing requirements for CLKIN (’C6701-120 device only)†‡ (see Figure 8)

’C6701-120

NO.

CLKMODE = x4

CLKMODE = x1

UNIT

NO.

MIN

MAX

MIN

MAX

UNIT

tc(CLKIN)

Cycle time, CLKIN

33.3

8.3

tw(CLKINH)

Pulse duration, CLKIN high

0.4C

0.45C

tw(CLKINL)

Pulse duration, CLKIN low

0.4C

0.45C

tt(CLKIN)

Transition time, CLKIN

0.6

† The reference points for the rise and fall transitions are measured at 20% and 80%, respectively, of VIH.

‡ C = CLKIN cycle time in ns. For example, when CLKIN frequency is 10 MHz, use C = 100 ns.

CLKIN

Figure 8. CLKIN Timings

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