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AD6620S/PCB датащи(PDF) 33 Page - Analog Devices

номер детали AD6620S/PCB
подробное описание детали  67 MSPS Digital Receive Signal Processor
PDF  44 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD6620S/PCB датащи(HTML) 33 Page - Analog Devices

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AD6620
–33–
REV. A
Mode = 0
If MODE is low during the access, the interface is in Mode 0.
In Mode 0 the
CS, RD and the WR lines control the access
type. While an access is being performed, or if the serial port
DATA VALID
tHC
tSC
tHC
tSC
tHM
ADDRESS VALID
N
N+1
N+2
N+3
N*
CLK1
WR2
RD2
CS3
D[7:0]
RDY
A[2:0]
NOTES:
1 RDY IS DRIVEN LOW ASYNCHRONOUSLY BY WR AND CS GOING LOW AND RETURNS HIGH ON THE
2 THESE SIGNALS (R/W AND DS) MAY REMAIN IN LOW STATE TO CONTINUE WRITING DATA.
3 CS MUST RETURN TO HIGH STATE AND BE SAMPLED BY CLK (N+3 SHOWN) TO COMPLETE WRITE.
*THE NEXT WRITE MAY BE INITIATED ON CLK, N.
tHA
tRDYH
tRDYL
tSAM
tSAM
RISING EDGE OF CLK "N+2".
Figure 44. Mode 0 Write (MODE = GND)
is accessing the chip, the RDY line goes low at the start of
the access. When the internal cycle is complete the RDY line
is released.
tDD
DATA VALID
tHC
tSC
tHC
tZD
tHA
tRDY
tRDY
ADDRESS VALID
tSAM
tZR
N
N+1
N+2
N+3
N+4
N
CLK1
WR2
RD2
CS3
D[7:0]
RDY1
A[2:0]
NOTES:
1 RDY IS DRIVEN LOW ASYNCHRONOUSLY BY RD AND CS GOING LOW AND RETURNS HIGH ON THE RISING EDGE
OF CLK "N+3" FOR INTERNAL ACCESS (A[2:0] = 000), CLK "N+2" OTHERWISE.
2 THE SIGNAL, WR, MAY REMAIN HIGH AND RD MAY REMAIN LOW TO CONTINUE READ MODE.
3 CS MUST RETURN TO HIGH STATE AND BE SAMPLED BY CLK (N+4 SHOWN) TO COMPLETE READ.
Figure 43. Mode 0 Read (MODE = GND)



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