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DSP56166ROM датащи(PDF) 26 Page - Motorola, Inc

номер детали DSP56166ROM
подробное описание детали  16-bit General Purpose Digital Signal Processor
PDF  63 Pages
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производитель  MOTOROLA [Motorola, Inc]
домашняя страница  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

DSP56166ROM датащи(HTML) 26 Page - Motorola, Inc

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PRELIMINARY - 6/15/93
MOTOROLA
DSP56166 Technical Data Sheet
16
2. When using fast interrupts and IRQA and IRQB are defined as level-sensitive, then timings 20 &
21 apply to prevent multiple interrupt service. To avoid these timing restrictions, the negative edge-
triggered mode is recommended when using fast interrupt. Long interrupts are recommended
when using level-sensitive mode.
3. The interrupt instruction fetch is visible on the pins only in Mode 3.
4. The minimum is specified for the duration of an edge triggered IRQA interrupt required to recover
from the STOP state. This is not the minimum required so that the IRQA interrupt is accepted.
5. Timing #22 is for all IRQx interrupts while timing #23 is only when exiting WAIT
6. Timing #22 triggers off T1 in the normal state and off phi1 when exiting the WAIT state.
7. The instruction fetch is visible on the pins only in Mode 2 and Mode 3.
Interrupt Figure 1. Asynchronous Reset Timing
Interrupt Figure 2. Synchronous Reset Timing
Interrupt Figure 3. Operating Mode Select Timing
RESET
D0-D15,
A0-A15,PS/DS
R/W,BS,PEREN
10
11
12
First Fetch
VIHR
CLKO
RESET
A0-A15,
PS/DS, BS,
R/W,PEREN
14
13
RESET
MODA, MODB,
MODC
VIHR
IRQA, IRQB
IRQC
VIHM
VILM
VIH
VIL
16
15



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