參數(shù)資料
型號： DSP56F805E
廠商： 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述： 16-bit Digital Signal Controllers
中文描述： 16位數(shù)字信號控制器
文件頁數(shù)： 34/56頁
文件大小： 415K
代理商： DSP56F805E
56F805
Technical Data, Rev. 15
34
Freescale Semiconductor
3.7 Reset, Stop, Wait, Mode Select, and Interrupt Timing
Table 3-11 Reset, Stop, Wait, Mode Select, and Interrupt Timing
1, 6
Operating Conditions:
V
SS
= V
SSA
= 0 V, V
DD
= V
DDA
= 3.0–3.6 V, T
A
= –40
°
to +85
°
C, C
L
≤
50pF
1.
In the formulas, T = clock cycle. For an operating frequency of 80MHz, T = 12.5ns.
Characteristic
Symbol
Min
Max
Unit
See Figure
RESET Assertion to Address, Data and Control
Signals High Impedance
t
RAZ
—
21
ns
Figure 3-12
Minimum RESET Assertion Duration
2
OMR Bit 6 = 0
OMR Bit 6 = 1
2.
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
t
RA
275,000T
128T
—
—
ns
ns
Figure 3-12
RESET Deassertion to First External Address Output
t
RDA
33T
34T
ns
Figure 3-12
Edge-sensitive Interrupt Request Width
t
IRW
1.5T
—
ns
Figure 3-13
IRQA, IRQB Assertion to External Data Memory
Access Out Valid, caused by first instruction
execution in the interrupt service routine
t
IDM
15T
—
ns
Figure 3-14
IRQA, IRQB Assertion to General Purpose Output
Valid, caused by first instruction execution in the
interrupt service routine
t
IG
16T
—
ns
Figure 3-14
IRQA Low to First Valid Interrupt Vector Address Out
recovery from Wait State
3
3.
not the minimum required so that the IRQA interrupt is accepted.
The minimum is specified for the duration of an edge-sensitive IRQA interrupt required to recover from the Stop state. This is
t
IRI
13T
—
ns
Figure 3-15
IRQA Width Assertion to Recover from Stop State
4
4.
The interrupt instruction fetch is visible on the pins only in Mode 3.
t
IW
2T
—
ns
Figure 3-16
Delay from IRQA Assertion to Fetch of first instruction
(exiting Stop)
OMR Bit 6 = 0
OMR Bit 6 = 1
t
IF
—
—
275,000T
12T
ns
ns
Figure 3-16
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
t
IRQ
—
—
275,000T
12T
ns
ns
Figure 3-17
Delay from Level Sensitive IRQA Assertion to First
Interrupt Vector Address Out Valid (exiting Stop)
OMR Bit 6 = 0
OMR Bit 6 = 1
t
II
—
—
275,000T
12T
ns
ns
Figure 3-17
RSTO pulse width
5
normal operation
internal reset mode
5.
ET = External Clock period, For an external crystal frequency of 8MHz, ET=125ns.
6.
Parameters listed are guaranteed by design.
t
RSTO
63ET
2,097,151ET
ns
ns
Figure 3-18
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