DSP56156ROM datasheet(34/76 Pages) MOTOROLA

34 / 76 page

AC Electrical Characteristics and Timing

DSP56156 Data Sheet

MOTOROLA

Bus Arbitration Timing — Slave Mode

(VCC = 5.0 V dc ± 10%, TJ = -40° to +125°C, CL = 50 pF + 1 TTL Load)

cyc

= Clock cycle = 1/2 instruction cycle = 2 T cycles

= Number of Wait States for external X or P memory, Determined by BCR

= WS × cyc=2T × WS

= Number of Wait States for external X memory, Determined by BCR

= Number of Wait States for external P memory, Determined by BCR

NOTES:

1. With no external access from the DSP56156

2. During external read or write access

3. During external read-modify-write access

4. During Stop mode — external bus is released and BG is always low

5. During Wait mode

6. With external accesses pending by the DSP56156

7. Slave mode, when bus is still busy after bus request has been deasserted

Table 17 Slave Mode

Num

Characteristics

40/50/60 MHz

Unit

Min

Max

BR Input to CLKO low setup time

Delay from BR Input Assertion to

(See Note 1)

BG Output Assertion

(See Note 2)

(See Note 3)

(See Note 4)

(See Note 5)

5T+1.9

3T+1.9

5T+1.9

T+1.9

9T+4.2

6T+WT+4.2

26T+4T x WX

+2T x WP+4.2

3T+4.2

CLKO high to BG Output Assertion

1.9

5.2

BG Output Deassertion Duration

(See Note 1)

(See Note 5)

(See Note 6)

5T-0.5

2T-0.5

3T-0.5

—

CLKO High to Control Bus High Impedance

2.7

6.5

CLKO High to BB Output Deassertion

3.2

7.8

CLKO High to BB Input

3.3

8.1

BR Input Deassertion to

(See Note 1)

BG Output Deassertion

(See Note 5)

(See Note 7)

4T+2.5

3T+3.2

9T+6.4

8T+7.8

8T+8.0

CLKO Low to BG Deassertion

(See Note 1)

CLKO High to BG Deassertion

(See Note 5)

CLKO High to BG Deassertion

(See Note 7)

2.5

3.2

6.4

7.8

8.0

CLKO High to BB Output Active

1.3

3.6

CLKO High to BB Output Assertion

2.3

CLKO High to Address and Control Bus Active

CLKO High to Address and Control Bus Valid

4.4

Bus Arbitration Timing — Slave Mode

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

DSP56156ROM Datasheet(PDF) 34 Page - Motorola, Inc

DSP56156ROM Datasheet(HTML) 34 Page - Motorola, Inc

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

Datasheet Download

Link URL