DSP56156 データシートの表示（PDF） - Motorola => Freescale

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DSP56156

16-bit Digital Signal Processor

Motorola => Freescale 

Freescale Semiconductor, Inc.

AC Electrical Characteristics and Timing

Reset, Stop, Wait, Mode Select, and Interrupt Timing

Reset, Stop, Wait, Mode Select, and Interrupt Timing

(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

ws = Number of wait states programmed into external bus access using BCR (WS = 0 - 31)

Table 13 Reset, Stop, Wait, Mode Select, and Interrupt Timing

Num

Characteristics

10 RESET Assertion to Address, Data and

Control Signals High Impedance

11 Minimum Stabilization Duration

(See Note 1) OMR bit 6=0

OMR bit 6=1

12 Asynchronous RESET Deassertion to

First External Address Output

(See Note 7)

13 Synchronous Reset Setup Time from

RESET Deassertion to Rising Edge of

CLKO

14 Synchronous Reset Delay Time from

CLKO High to the First External Access

(See Note 7)

15 Mode Select Setup Time

16 Mode Select Hold Time

17 Edge-triggered Interrupt Request Width

18 Delay from IRQA, IRQB Assertion to

External Data Memory Access Out Valid

- Caused by First Interrupt

Instruction Fetch

- Caused by First Interrupt

Instruction Execution

19 Delay from IRQA, IRQB Assertion to

General Purpose Output Valid Caused

by the Execution of the First Interrupt

Instruction

20 Delay from External Data Memory

Address Output Valid Caused by First

Interrupt Instruction Execution to Inter-

rupt Request Deassertion for Level Sen-

sitive Fast Interrupts (See Note 2)

40 MHz

Min

Max

—

25

50 MHz

Min

Max

—

23

600KT

60T

16T

—

600KT

—

60T

18T+20

16T

—

—

18T+17

7

cyc-4

6

cyc-3

16T+3 16T+20 16T+ 3 16T+18

22

—

20

—

0

—

0

—

13

—

11

—

11T+4

—

11T+4

—

19T+4

—

19T+4

—

—

22T+5

22T+4

—

—

5T-26

—

5T-24

+

+

cyc × ws

cyc × ws

60 MHz

Min

Max

—

21

Unit

ns

600KT

—

ns

60T

—

ns

16T

18T+15

ns

5

cyc-2

ns

16T+3 16T+16

ns

18

—

ns

0

—

ns

9

—

ns

11T+3

—

ns

19T+3

—

ns

22T+3

—

ns

—

5T-22

ns

+

cyc × ws

22

DSP56156 Data Sheet

MOTOROLA

For More Information On This Product,

Go to: www.freescale.com

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