DSP56F801PB MOTOROLA [Motorola, Inc], DSP56F801PB Datasheet - Page 24

• Manufacturer Part Number: DSP56F801PB
• Description: 16-bit Digital Signal Processor
• Manufacturer: MOTOROLA [Motorola, Inc]

Operating Conditions:
3.6 Reset, Stop, Wait, Mode Select, and Interrupt Timing
24
RESET Assertion to Address, Data and Control
Signals High Impedance
Minimum RESET Assertion Duration
OMR Bit 6 = 0
OMR Bit 6 = 1
RESET De-assertion to First External Address
Output
Edge-sensitive Interrupt Request Width
IRQA, IRQB Assertion to External Data Memory
Access Out Valid, caused by first instruction
execution in the interrupt service routine
IRQA, IRQB Assertion to General Purpose Output
Valid, caused by first instruction execution in the
interrupt service routine
IRQA Low to First Valid Interrupt Vector Address
Out recovery from Wait State
IRQA Width Assertion to Recover from Stop State
Delay from IRQA Assertion to Fetch of first
instruction (exiting Stop)
OMR Bit 6 = 0
OMR Bit 6 = 1
Duration for Level Sensitive IRQA Assertion to
Cause the Fetch of First IRQA Interrupt Instruction
(exiting Stop)
OMR Bit 6 = 0
OMR Bit 6 = 1
Delay from Level Sensitive IRQA Assertion to First
Interrupt Vector Address Out Valid (exiting Stop)
OMR Bit 6 = 0
OMR Bit 6 = 1
1.
2.
3.
This is not the minimum required so that the IRQA interrupt is accepted.
4.
5.
In the formulas, T = clock cycle. For an operating frequency of 80 MHz, T = 12.5 ns.
Circuit stabilization delay is required during reset when using an external clock or crystal oscillator in two cases:
• After power-on reset
• When recovering from Stop state
The minimum is specified for the duration of an edge-sensitive IRQA interrupt required to recover from the Stop state.
The interrupt instruction fetch is visible on the pins only in Mode 3.
Parameters listed are guaranteed by design.
Table 25. Reset, Stop, Wait, Mode Select, and Interrupt Timing
Characteristic
V
SS
= V
3
SSA
= 0 V, V
2
DSP56F801 Preliminary Technical Data
DD
= V
DDA
4
= 3.0–3.6 V, T
Symbol
t
t
t
t
t
RAZ
t
RDA
t
IRW
IDM
t
t
IRQ
t
RA
IRI
IW
t
IG
IF
II
Typical Min
A
275,000T
= –40 to +85 C, C
128T
1.5T
33T
—
—
—
—
—
—
—
—
—
—
—
Typical Max
275,000T
275,000T
275,000T
L
34T
15T
16T
13T
12T
12T
12T
2T
21
—
—
—
50 pF
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1, 5
MOTOROLA
Figure 15
Figure 15
Figure 15
Figure 16
Figure 17
Figure 17
Figure 18
Figure 19
Figure 19
Figure 20
Figure 20
See