AD6620S/PCB Analog Devices Inc, AD6620S/PCB Datasheet - Page 10

• Manufacturer Part Number: AD6620S/PCB
• Description: BOARD EVAL DUAL RCVR W/AD6620AS
• Manufacturer: Analog Devices Inc

Specifications of AD6620S/PCB

• Rohs Status: RoHS non-compliant
• Module/board Type: Evaluation Board
• For Use With/related Products: AD6620

AD6620
MICROPORT MODE1, READ
Timing is synchronous to CLK; MODE = 1.
MICROPORT MODE1, WRITE
Timing is synchronous to CLK; MODE = 1.
DTACK
D[7:0]
A[2:0]
DTACK
D[7:0]
A[2:0]
CLK
R/W
DS
CS
CLK
R/W
DS
CS
2
3
NOTES:
1
2
3
2
3
2
1
2
1
DTACK IS DRIVEN LOW ON THE RISING EDGE OF CLK "N+3" FOR INTERNAL ACCESS (A[2:0] = 000),
CLK "N=2" OTHERWISE.
THE SIGNAL, R/W MAY REMAIN HIGH AND DS MAY REMAIN LOW TO CONTINUE READ MODE.
CS MUST RETURN TO HIGH STATE AND BE SAMPLED BY CLK (N+4 SHOWN) TO COMPLETE ACCESS
AND FORCE DTACK HIGH.
t
SAM
NOTES:
1
2
3
* THE NEXT WRITE MAY BE INITIATED ON CLK, N*.
ON RISING EDGE OF "N+3" CLK, DTACK IS DRIVEN LOW.
THESE SIGNALS (R/W AND DS) MAY REMAIN IN LOW STATE TO CONTINUE WRITING DATA.
CS MUST RETURN TO HIGH STATE AND BE SAMPLED BY CLK (N+3 SHOWN) TO COMPLETE WRITE
AND FORCE DTACK HIGH.
t
SC
t
t
t
ZR
SAM
SAM
N
t
SC
N
N+1
ADDRESS VALID
DATA VALID
ADDRESS VALID
N+1
t
N+2
DD
t
DTACK
N+2
t
DTACK
t
t
t
HC
HM
HA
DATA VALID
N+3
t
t
SC
HC
t
t
N+3
DTACK
HC
t
SC
t
ZD
N+4
t
t
HC
HA
t
DTACK
N*
N