TNETV1647GSTZWT datasheet(112/236 Pages) TI1

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MXI/CLKIN

TMS320DM6441

SPRS359E – SEPTEMBER 2006 – REVISED AUGUST 2010

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6.6.3

Clock PLL Electrical Data/Timing (Input and Output Clocks)

Table 6-16. Timing Requirements for MXI/CLKIN Devices(1) (2) (3) (4) (see Figure 6-14)

1.05 V and 1.2 V

NO.

UNIT

MIN

MAX

tc(MXI)

Cycle time, MXI/CLKIN

33.3

tw(MXIH)

Pulse duration, MXI/CLKIN high

0.45C

0.55C

tw(MXIL)

Pulse duration, MXI/CLKIN low

0.45C

0.55C

tt(MXI)

Transition time, MXI/CLKIN

0.05C

tJ(MXI)

Period jitter, MXI/CLKIN

0.02C

(1)

Setup before end of STROBE phase (if no extended wait states are inserted) by which EM_WAIT must be asserted to add extended

wait states. Figure 6-23 and Figure 6-24 describe EMIF transactions that include extended wait states inserted during the STROBE

phase. However, cycles inserted as part of this extended wait period should not be counted; the 4E requirement is to the start of where

the HOLD phase would begin if there were no extended wait cycles.

(2)

The reference points for the rise and fall transitions are measured at VIL MAX and VIH MIN.

(3)

For more details on the PLL multiplier factors, see the TMS320DM644x ARM Subsystem Reference Guide (literature number

SPRUE14).

(4)

C = CLKIN cycle time in ns. For example, when MXI/CLKIN frequency is 27 MHz, use C = 37.037 ns.

Figure 6-14. MXI/CLKIN Timing

Table 6-17. Timing Requirements for M24XI Devices(1) (2) (3) (see Figure 6-15)

1.05 V and 1.2 V

NO.

UNIT

MIN

TYP

MAX

tc(M24XI)

Cycle time, M24XI

41.6

tw(M24XIH)

Pulse duration, M24XI high

0.45C

0.55C

tw(M24XIL)

Pulse duration, M24XI low

0.45C

0.55C

tt(M24XI)

Transition time, M24XI

0.05C

tJ(M24XI)

Period jitter, M24XI

0.02C

(1)

The reference points for the rise and fall transitions are measured at VIL MAX and VIH MIN.

(2)

For more details on the PLL, see the TMS320DM644x DMSoC Universal Serial Bus (USB) Controller User's Guide (literature number

SPRUE35).

(3)

C = M24XI cycle time in ns. For example, when M24XI frequency is 24 MHz, use C = 41.6 ns.

Figure 6-15. M24XI Timing

112

Peripheral and Electrical Specifications

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