Texas Instruments SM320C6455-EP manual Emifa Electrical Data/Timing, Aeclkin

Models: SM320C6455-EP

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SM320C6455-EP

FIXED-POINT DIGITAL SIGNAL PROCESSOR

www.ti.com

SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008

7.10.3 EMIFA Electrical Data/Timing

Table 7-42. Timing Requirements for AECLKIN for EMIFA(1)(2) (see Figure 7-31)

 

 

 

-720

 

 

 

 

 

-850

 

 

NO.

 

 

A-1000/-1000

UNIT

 

 

 

-1200

 

 

 

 

 

MIN

MAX

 

1

t

Cycle time, AECLKIN

6(3)

40

ns

 

c(EKI)

 

 

 

 

2

tw(EKIH)

Pulse duration, AECLKIN high

2.7

 

ns

3

tw(EKIL)

Pulse duration, AECLKIN low

2.7

 

ns

4

tt(EKI)

Transition time, AECLKIN

 

2

ns

5

tJ(EKI)

Period Jitter, AECLKIN

 

0.02E(4)

ns

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

(2)E = the EMIF input clock (AECLKIN or SYSCLK4) period in ns for EMIFA.

(3)Minimum AECLKIN cycle times must be met, even when AECLKIN is generated by an internal clock source. Minimum AECLKIN times are based on internal logic speed; the maximum useable speed of the EMIF may be lower due to AC timing requirements.

(4)This timing only applies when AECLKIN is used for EMIFA.

5

1

4

2

AECLKIN

3

4

Figure 7-31. AECLKIN Timing for EMIFA

164

C64x+ Peripheral Information and Electrical Specifications

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Texas Instruments SM320C6455-EP manual Emifa Electrical Data/Timing, Timing Requirements for Aeclkin for EMIFA12 see Figure