參數(shù)資料
型號: ADSP-21362BBC-1AA
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號處理
英文描述: SHARC Processor
中文描述: 16-BIT, 55.55 MHz, OTHER DSP, PBGA136
封裝: MO-205AE, BGA-136
文件頁數(shù): 24/52頁
文件大?。?/td> 1320K
代理商: ADSP-21362BBC-1AA
Rev. A
|
Page 24 of 52
|
December 2006
ADSP-21362/ADSP-21363/ADSP-21364/ADSP-21365/ADSP-21366
Precision Clock Generator (Direct Pin Routing)
This timing is only valid when the SRU is configured such that
the precision clock generator (PCG) takes its inputs directly
from the DAI pins (via pin buffers) and sends its outputs
directly to the DAI pins. For the other cases, where the PCG’s
inputs and outputs are not directly routed to/from DAI pins (via
pin buffers) there is no timing data available. All timing param-
eters and switching characteristics apply to external DAI pins
(DAI_P01 – DAI_P20).
Table 20. Precision Clock Generator (Direct Pin Routing)
Parameter
Timing Requirement
s
t
PCGIP
t
STRIG
Min
Max
Unit
Input Clock Period
PCG Trigger Setup Before Falling
Edge of PCG Input Clock
PCG Trigger Hold After Falling
Edge of PCG Input Clock
Switching Characteristics
t
DPCGIO
PCG Output Clock and Frame Sync Active Edge
Delay After PCG Input Clock
t
DTRIGCLK
PCG Output Clock Delay After PCG Trigger
t
DTRIGFS
PCG Frame Sync Delay After PCG Trigger
t
PCGOP
Output Clock Period
D = FSxDIV, PH = FSxPHASE. For more information, see the
ADSP-2136x SHARC Processor Hardware Reference
, “Precision Clock Generators”
chapter.
20
4.5
ns
ns
t
HTRIG
3
ns
2.5
2.5 + ((2.5 + D) × t
PCGIP
)
2.5 + ((2.5 + D – PH) × t
PCGIP
)
2 × t
PCGIP
1
10
10 + ((2.5 + D) × t
PCGIP
)
10 + ((2.5 + D – PH) × t
PCGIP
)
ns
ns
ns
ns
1
In normal mode, t
PCGOP
(min) = 2 × t
PCGIP
.
Figure 16. Precision Clock Generator (Direct Pin Routing)
DAI_Pn
PCG_TRIGx_I
t
STRIG
DAI_Pm
PCG_EXTx_I
(CLKIN)
DAI_Py
PCG_CLKx_O
DAI_Pz
PCG_FSx_O
t
HTRIG
t
DPCGIO
t
DTRIGFS
t
PCGIP
t
PCGOP
t
DTRIGCLK
t
DPCGIO
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