ADSP-21266SKSTZ-1C View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'ADSP-21266SKSTZ-1C' PDF : 44 Pages View PDF
ADSP-21266
Precision Clock Generator (Direct Pin Routing)
The timing in Table 18 and Figure 15 is valid only when the
SRU is configured such that the precision clock generator
(PCG) takes its inputs directly from the DAI pins (via pin buff-
ers) 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 parameters and switching characteris-
tics apply to external DAI pins (DAI_P07 – DAI_P20).
Table 18. Precision Clock Generator (Direct Pin Routing)
Parameter
Min
Timing Requirements
tPCGIW
Input Clock Pulse Width
20
tSTRIG
PCG Trigger Setup Before Falling Edge of PCG Input Clock
2
tHTRIG
PCG Trigger Hold After Falling Edge of PCG Input Clock
2
Max
Unit
ns
ns
ns
Switching Characteristics
tDPCGIO
PCG Output Clock and Frame Sync Active Edge Delay After PCG Input
Clock Falling Edge
tDTRIG
tPCGOW
PCG Output Clock and Frame Sync Delay After PCG Trigger
Output Clock Pulse Width
2.5
2.5 + 2.5 Ă— tPCGOW
40
10
ns
10 + 2.5 Ă— tPCGOW ns
ns
DAI_Pn
PCG_TRIGx_I
DAI_Pm
PCG_EXTx_I
(CLKIN)
DAI_Py
PCG_CLKx_O
DAI_Pz
PCG_FSx_O
tSTRIG
tHTRIG
tPCGIW
tDPCGIO
tPCGOW
tDTRIG
Figure 15. Precision Clock Generator (Direct Pin Routing)
Rev. B | Page 23 of 44 | May 2005
Share Link: 
