TMP32C6411ZLZ datasheet(75/119 Pages) TI

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TMS320C6411

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS196H − MARCH 2002 − REVISED JULY 2004

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

ASYNCHRONOUS MEMORY TIMING

timing requirements for asynchronous memory cycles†‡ (see Figure 22 and Figure 23)

NO.

−300

UNIT

NO.

MIN

MAX

UNIT

tsu(EDV-AREH)

Setup time, EDx valid before ARE high

6.5

th(AREH-EDV)

Hold time, EDx valid after ARE high

tsu(ARDY-EKO1H)

Setup time, ARDY valid before ECLKOUTx high

th(EKO1H-ARDY)

Hold time, ARDY valid after ECLKOUTx high

Rev 1.1

th(EKO1H-ARDY)

Hold time, ARDY valid after ECLKOUTx high

Rev 2.0

1.3

† To ensure data setup time, simply program the strobe width wide enough. ARDY is internally synchronized. The ARDY signal is only recognized

two cycles before the end of the programmed strobe time and while ARDY is low, the strobe time is extended cycle-by-cycle. When ARDY is

recognized low, the end of the strobe time is two cycles after ARDY is recognized high. To use ARDY as an asynchronous input, the pulse width

of the ARDY signal should be wide enough (e.g., pulse width = 2E) to ensure setup and hold time is met.

‡ RS = Read setup, RST = Read strobe, RH = Read hold, WS = Write setup, WST = Write strobe, WH = Write hold. These parameters are

programmed via the EMIF CE space control registers.

switching characteristics over recommended operating conditions for asynchronous memory

cycles‡§¶ (see Figure 22 and Figure 23)

NO.

PARAMETER

−300

UNIT

NO.

PARAMETER

MIN

MAX

UNIT

tosu(SELV-AREL)

Output setup time, select signals valid to ARE low

RS * E − 1.5

toh(AREH-SELIV)

Output hold time, ARE high to select signals invalid

RS * E − 1.9

td(EKO1H-AREV)

Delay time, ECLKOUTx high to ARE vaild

tosu(SELV-AWEL)

Output setup time, select signals valid to AWE low

WS * E − 1.7

toh(AWEH-SELIV)

Output hold time, AWE high to select signals invalid

WH * E − 1.8

td(EKO1H-AWEV)

Delay time, ECLKOUTx high to AWE vaild

1.3

7.1

‡ RS = Read setup, RST = Read strobe, RH = Read hold, WS = Write setup, WST = Write strobe, WH = Write hold. These parameters are

programmed via the EMIF CE space control registers.

§ E = ECLKOUT1 period in ns

¶ Select signals for EMIF include: CEx, BE[3:0], EA[22:3], AOE; and for EMIF writes, include ED[31:0].

TMP32C6411ZLZ Datasheet(PDF) 75 Page - Texas Instruments

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