TMS320VC5510 datasheet(53/90 Pages) TI1

53 / 90 page

Electrical Specifications

June 2000 − Revised September 2007

SPRS076O

5.6

Clock Options

This section provides the timing requirements and switching characteristics for the various clock options

available on the 5510/5510A.

5.6.1 Clock Generation in Bypass Mode (DPLL Disabled)

The frequency of the reference clock provided at the CLKIN pin can be divided by a factor of one, two, or four

to generate the internal CPU clock cycle. The divide factor (D) is set in the BYPASS_DIV field of the clock mode

the digital phase-locked loop (DPLL) clock synthesis is disabled.

Table 5−1 and Table 5−2 assume testing over recommended operating conditions and H = 0.5tc(CO) (see

Figure 5−2).

Table 5−1. CLKIN in Bypass Mode Timing Requirements

NO.

VC5510/5510A-160

VC5510/5510A-200

UNIT

NO.

MIN

MAX

MIN

MAX

UNIT

tc(CI)

Cycle time, CLKIN

†

tf(CI)

Fall time, CLKIN

tr(CI)

Rise time, CLKIN

C10

tw(CIL)

Pulse duration, CLKIN low

C11

tw(CIH) Pulse duration, CLKIN high

† This device utilizes a fully static design and therefore can operate with tc(CI) approaching ∞. The device is characterized at frequencies

approaching 0 Hz.

Table 5−2. CLKOUT in Bypass Mode Switching Characteristics

NO.

PARAMETER

VC5510/5510A-160

VC5510/5510A-200

UNIT

NO.

PARAMETER

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

tc(CO)

Cycle time, CLKOUT

tc(CI)/N‡

td(CI-CO)

Delay time, CLKIN high/low to CLKOUT high/low

tf(CO)

Fall time, CLKOUT

tr(CO)

Rise time, CLKOUT

tw(COL)

Pulse duration, CLKOUT low

H−1

H+1

H−1

H+1

tw(COH)

Pulse duration, CLKOUT high

H−1

H+1

H−1

H+1

‡ N = Clock frequency synthesis factor

CLKOUT

CLKIN

C11

C10

NOTE A: The relationship of CLKIN to CLKOUT depends on the divide factor chosen. The waveform relationship shown in Figure 5−2 is intended

to illustrate the timing parameters only and may differ based on configuration.

Figure 5−2. Bypass Mode Clock Timing

TMS320VC5510 Datasheet(PDF) 53 Page - Texas Instruments

TMS320VC5510 Datasheet(HTML) 53 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90

Datasheet Download

Link URL