TMS320C6454

Fixed-Point Digital Signal Processor

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SPRS311A –APRIL 2006 –REVISED DECEMBER 2006

Table 7-45. Switching Characteristics Over Recommended Operating Conditions for Asynchronous

Memory Cycles for EMIFA Module(1) (2) (3) (see Figure 7-33and Figure 7-34)

NO.

1tosu(SELV-AOEL)

2toh(AOEH-SELIV)

10td(EKOH-AOEV)

11tosu(SELV-AWEL)

12toh(AWEH-SELIV)

13td(EKOH-AWEV)

 

-720

 

 

PARAMETER

-850

 

UNIT

-1000

 

 

 

 

 

MIN

MAX

 

Output setup time, select signals valid to AAOE low

RS * E – 1.5

 

ns

Output hold time, AAOE high to select signals invalid

RS * E – 1.9

 

ns

Delay time, AECLKOUT high to AAOE valid

1

7

ns

Output setup time, select signals valid to AAWE low

WS * E – 1.7

 

ns

Output hold time, AAWE high to select signals invalid

WH * E – 1.8

 

ns

Delay time, AECLKOUT high to AAWE valid

1.3

7.1

ns

(1)E = AECLKOUT period in ns for EMIFA

(2)RS = Read setup, RST = Read strobe, RH = Read hold, WS = Write setup, WST = Write strobe, WH = Write hold. These parameters are programmed via the EMIFA CE Configuration registers (CEnCFG).

(3)Select signals for EMIFA include: ACEx, ABE[7:0], AEA[19:0], ABA[1:0]; and for EMIFA writes, also include AR/W, AED[63:0].

 

 

Strobe = 4

 

 

Setup = 1

 

Hold = 1

AECLKOUT

1

 

2

 

 

ACEx

1

 

2

 

 

ABE[7:0]

 

Byte Enables

2

AEA[19:0]/

1

 

 

 

 

Address

 

ABA[1:0]

 

 

 

3

4

 

 

AED[63:0]

 

Read Data

AAOE/ASOE(A)

10

10

 

 

 

 

AAWE/ASWE(A)

 

 

 

AR/W

 

 

 

AARDY(B)

 

DEASSERTED

 

AAAOE/ASOE and AAWE/ASWE operate as AAOE (identified under select signals) and AAWE, respectively, during asynchronous memory accesses.

BPolarity of the AARDY signal is programmable through the AP field of the EMIFA Async Wait Cycle Configuration register (AWCC).

Figure 7-33. Asynchronous Memory Read Timing for EMIFA

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Texas Instruments TMS320C6454 warranty Setup = Hold =, ACEx ABE70, ABA10 AED630 Read Data